If the income of A is 25 % less than the income of B, then the income of B is…
2023
If the income of A is 25 % less than the income of B, then the income of B is greater than the income of A by -----%?
- A.
30%
- B.
50%
- C.
33.33%
- D.
20%
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Correct answer: C
Solution: Use a simple reference value to compute the percentage.
General formula: If A is r% less than B, then B is greater than A by r/(100−r) × 100%.
Take B = 100 for easy calculation. Since A is 25% less than B, A = 100 − 25 = 75.
The difference between B and A is 100 − 75 = 25.
Percentage by which B is greater than A = (difference / A) × 100 = (25/75) × 100 = 33 1/3% (≈33.33%).
Answer: 33.33% (33 1/3%).