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
