Question

If A is increased by 20 percent, it equals to B. If B is decreased by 50 percent, it equals to C. Then what percent of A is equal to C?

Answer 1

By the data given in the question, we can establish the following relations

i) 0.8A = B
ii) 0.5B = C

Putting value of B from i to ii

0.5(0.8A) = C
=> 0.4A = C

Hence C is 40% of A

Answer 2

A+20=B
A-B=-20----(1)
B-50=C
B-C=50---(2)
If (2) is subtracted from (1),Then
A-C=70
A-70=C