Following is the data regarding the revenue and expenditure of 4 companies in 2018 and in 2017. All figures are in Rs crore. Profit = Revenue – Expenditure Percentage profit = (Profit/Expenditure)*100% 2017 2018 Revenue Expenditure Revenue Expenditure Mckinsey 5800 5300 6000 5000 BCG 6000 5400 5600 4800 Bain 5000 4800 5400 4800 ATK 4800 4000 5000 4000 For all 4 companies combined, what is the percentage (approximately) increase in the sum of their profits from 2017 to 2018?

Explanation

2 Detailed solution: 2017 2018 Profit Percentage profit Profit Percentage profit Mckinsey 5800-5300 = (500/5300)*100% 6000-5000 = (1000/5000)*100% 500 = 9(23/53)% 1000 = 20% BCG 6000-5400 = (600/5400)*100% 5600-4800 = (800/4800)*100% = 600 = 11(1/9)% 800 16(2/3)% Bain 5000-4800 = (200/4800)*100% 5400-4800 = (600/4800)*100% = 200 = 4(1/6)% 600 12.5% ATK 4800-4000 = (800/4000)*100% 5000-4000 = (1000/4000)*100% 800 = 20% 1000 = 25% Profit in 2017 = 500 + 600 + 200 + 800 = Rs 2100 crore Profit in 2018 = 1000 + 800 + 600 + 1000 = Rs 3400 crore Required percentage = ((3400 - 2100)/2100)*100% ≈ 62%