In 2020, the medical expense of a person increased by 80%. If his medical expense in 2019 was 10% of his salary, then what percent of his salary was the medical expense in 2020?
20%
18%
16%
15%
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CBI DSP LDCE – 2023
His medical expense in 2019 was 10% of his salary, which is 0.10 * S.
In 2020, the medical expense increased by 80%. The increase amount is 80% of the 2019 expense.
Increase = 80% of (0.10 * S) = (80/100) * (0.10 * S) = 0.80 * 0.10 * S = 0.08 * S.
The medical expense in 2020 is the 2019 expense plus the increase:
Expense in 2020 = (0.10 * S) + (0.08 * S) = 0.18 * S.
To express this as a percentage of his salary in 2020 (assuming salary remained the same, as implied by the question structure), we have:
Percentage = (Expense in 2020 / Salary) * 100%
Percentage = (0.18 * S / S) * 100% = 0.18 * 100% = 18%.