If 16.66% of 33.33% of 66.66% of a certain number equals 30, what is that number?

Explanation

Let the unknown number be x. We have (16.66% × 33.33% × 66.66%) × x = 30. Converting percentages to fractions: (1/6) × (1/3) × (2/3) × x = 30. Simplifying gives (1/27) × x = 30, so x = 30 × 27 = 810.