The correct answer is (a).
The percentage increase in profit over the previous year’s profit is calculated as follows:
Percentage increase = (Profit this year – Profit last year) / Profit last year * 100%
In 2008, the profit was 2050 – 1500 = 550.
In 2007, the profit was 2000.
The percentage increase in profit over the previous year’s profit in 2008 is therefore 550 / 2000 * 100% = 27.5%.
In 2009, the profit was 2170 – 1600 = 570.
In 2008, the profit was 2050.
The percentage increase in profit over the previous year’s profit in 2009 is therefore 570 / 2050 * 100% = 27.8%.
In 2010, the profit was 2200 – 1600 = 600.
In 2009, the profit was 2170.
The percentage increase in profit over the previous year’s profit in 2010 is therefore 600 / 2170 * 100% = 27.8%.
In 2011, the profit was 2250 – 1650 = 600.
In 2010, the profit was 2200.
The percentage increase in profit over the previous year’s profit in 2011 is therefore 600 / 2200 * 100% = 27.27%.
Therefore, the company registered the highest percentage increase in profit over the previous year’s profit in 2008.