Question
The income of A is 25% less than the income of B whose
income is 40% more than that of C. The income of C is 20% less than that of D. By what percent is the income of A more than the income of C?Solution
Let the income of C be x According to the question The income of B is 40% more than the income of C. The income of B = x + 40% of x =7x/5 The income of A= income of B-25% of income of B = 7x/ 5-1/4 x7x/5 =21x/20 Now, the difference between the income of A and C = 21x/20 -x = x/ 20 The percentage required is = x/ 20 × 1/x × 100 = 5% The income of A is 5% more than that of C.
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