If one-fourth of half of a number is 25, then 20% of that number is:

Correct option is D

Given:

One-fourth of half of a number is 25.

Solution:

Let the number be 'x'.

Half of the number is $$\frac x2.$$​​

One-fourth of half the number is $$\frac14 \times \frac x2 = \frac x8.$$​​

According to the problem,$$\frac x8$$​ = 25.

x = 25 $$\times$$​ 8

x = 200

20% of x = $$\frac{20}{100}\times$$​200

20% of x = 40

Therefore, 20% of the number is 40.