When a number is successively decreased by 10 percent, 15 percent and 56 percent, then it becomes 20196. What is that number?

Correct option is D

Given:
Final value after successive decreases = 20196
Percentage decreases = 10%, 15%, and 56%
Solution:
Let the original number be N.
Successive decreases: N ×(1 - 10/100) ×(1 - 15/100) ×(1 - 56/100) = 20196
N ×0.9 ×0.85 ×0.44 = 20196
N ×0.3366 = 20196
N = 20196 / 0.3366 = 60000
Thus, the original number is 60000.