Question

If 70% of a number is subtracted from itself it reduces to 81.what is two fifth of that no.?

• A. 108
• B. 116
• C. 100
• D. 102

Answer 1

Answer:

A. 108

Let the number be 'A' A – 70 % of A = 81 ⇒ A – 70/100 × A = 81 ⇒ A – 0.7A = 81 ⇒ 0.3A = 81 ⇒ A = 81/0.3 ⇒ A = 270 we need to find 2A/5 = 2 × 270 / 5 = 2 × 54 = 108