Single correct option
A's monthly salary is 30% more than B's, and B's monthly salary is 20% less than C's. If C earns ₹50,000 a month, by what percentage does A's salary exceed C's?
- A. 10%
- B. 4%
- C. 6%
- D. Neither — A earns less than C
Show answer and solution
Answer: (B) 4%
B = 0.8 × 50,000 = ₹40,000. A = 1.3 × 40,000 = ₹52,000.
A exceeds C by 2,000/50,000 × 100 = 4%.
Shortcut: successive changes +30% and −20% combine to 30 − 20 − (30×20)/100 = 4%. A common trap is to answer 10% by simply subtracting 20 from 30.
A exceeds C by 2,000/50,000 × 100 = 4%.
Shortcut: successive changes +30% and −20% combine to 30 − 20 − (30×20)/100 = 4%. A common trap is to answer 10% by simply subtracting 20 from 30.
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