Question

53. If a number is increased by 20% and
then decreased by 20%, the net
increase/decrease percentage will be
(A. No change (B) 4% increase
(C) 4% decrease (D) 9% decrease​

Answer 1

Answer:

Option (C) 4% decrease

Step-by-step explanation:

Let us say that the original number = x

After increase, the number will become = x(1+20/100) = 6/5 x

Now, after decrease, the number will become = 6/5 x (1-20/100) = 6x/5 × 4/5 = 24x/25

Now, the original number = x = 25x/25

Cleary, the resultant is less than the original.

Amount of decrease = x/25

Decrease % = (x/25) ÷ x × 100 = 4%

So, the answer is Option (C)

Answer 2

Answer:

4% increase

Step-by-step explanation:

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