{"id":1538,"date":"2024-03-05T15:19:01","date_gmt":"2024-03-05T15:19:01","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=1538"},"modified":"2024-03-05T15:19:01","modified_gmt":"2024-03-05T15:19:01","slug":"two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/","title":{"rendered":"Two numbers B and C are respectively, 15% and 32% less than a third number A. By what percentage is the number C less than the number B ?"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a985f9dd0915\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    23.50%                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    22%                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    20%                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    18%                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is (a) 23.5%.<\/p>\n<p>Let $A$ be the third number. Then $B$ is 15% less than $A$, so $B = 0.85A$. $C$ is 32% less than $A$, so $C = 0.68A$.<\/p>\n<p>To find the percentage by which $C$ is less than $B$, we can use the following formula:<\/p>\n<p>Percentage change = $\\frac{new &#8211; old}{old} \\times 100\\%$<\/p>\n<p>In this case, the new value is $C$ and the old value is $B$. So, <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> the percentage change is:<\/p>\n<p>Percentage change = $\\frac{0.68A &#8211; 0.85A}{0.85A} \\times 100\\% = 23.5\\%$<\/p>\n<p>Therefore, $C$ is 23.5% less than $B$.<\/p>\n<p>Here is a brief explanation of each option:<\/p>\n<p>(a) 23.5%: This is the correct answer. It is calculated by using the formula above.<br \/>\n(b) 22%: This is incorrect. It is calculated by using the formula <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> above, but with the wrong values.<br \/>\n(c) 20%: This is incorrect. It is calculated by using the formula above, but with the wrong values.<br \/>\n(d) 18%: This is incorrect. It is calculated by using the formula above, but with the wrong values.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[304],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Two numbers B and C are respectively, 15% and 32% less than a third number A. By what percentage is the number C less than the number B ?<\/title>\n<meta name=\"description\" content=\"Let $A$ be the third number. Then $B$ is 15% less than $A$, so $B = 0.85A$. $C$ is 32% less than $A$, so $C = 0.68A$.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Two numbers B and C are respectively, 15% and 32% less than a third number A. By what percentage is the number C less than the number B ?\" \/>\n<meta property=\"og:description\" content=\"Let $A$ be the third number. 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By what percentage is the number C less than the number B ?","description":"Let $A$ be the third number. Then $B$ is 15% less than $A$, so $B = 0.85A$. $C$ is 32% less than $A$, so $C = 0.68A$.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/","og_locale":"en_US","og_type":"article","og_title":"Two numbers B and C are respectively, 15% and 32% less than a third number A. By what percentage is the number C less than the number B ?","og_description":"Let $A$ be the third number. Then $B$ is 15% less than $A$, so $B = 0.85A$. $C$ is 32% less than $A$, so $C = 0.68A$.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-03-05T15:19:01+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/","url":"https:\/\/exam.pscnotes.com\/mcq\/two-numbers-b-and-c-are-respectively-15-and-32-less-than-a-third-number-a-by-what-percentage-is-the-number-c-less-than-the-number-b\/","name":"Two numbers B and C are respectively, 15% and 32% less than a third number A. 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