One fifth of the number is 81. What will be 57% of that number?

The correct answer is Option (2) → 230.85

If one-fifth of the number is 81, the number is made of five such parts, so the whole number is five times 81. Then 57% of it means 57 parts out of every 100 of that number.

• The whole number, five fifths: \(81\times5=405\)

• 57% of the number: \(\displaystyle \frac{57\times405}{100}=\frac{23085}{100}=230.85\)