If 20% of a number is 30, then the number is :

The correct answer is Option (2) → 150

20% of the number is 30, so 1% of it is a twentieth of 30, and the whole number is 100% of itself.

• 1% of the number \(\displaystyle =\frac{30}{20}=1.5\)

• The number \(=1.5\times100=150\)