16.66% of 33.33% of 66.66% of ? = 30

A. 90
B. 270
C. 810
D. 240

Explanation:

16.66% of 33.33% of 66.66% of x = 30

= 1/6 of 1/3 of 2/3 of x = 30
=> (30 * 6 * 3 * 3)/2 => x = 810