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

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

A108

B116

C100

D102

Answer:

A. 108

Read Explanation:

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

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