Monil's monthly income is reduced by 18%. By approximate what percentage his monthly income must be increased so that it is again equal to his original monthly income?

Correct option is D

Given:
Monil's income is reduced by 18%.
Formula Used:
If an income is reduced by x%, the required percentage increase to restore the original value is given by the formula:
Required Increase = [x / (100 - x)] * 100
Solution:
Monil's income is reduced by 18%, so x = 18
Required Increase = [18 / (100 - 18)] * 100 = [18 / 82] * 100 ≈ 21.95%
Therefore, Monil's income must be increased by approximately 21.95% to restore it to the original amount.