8 is 15% of what number?

15% of 18.95 is what number?

what percent of 64 is 326?

10% of what number is 40?

Q1. The answer is 53.33

The initial number is 100%. So, make a proportion:

If 8 is 15%, what number is 100%?

8 : 15% = x : 100%

15% * x = 8 * 100%

x = 8 * 100% / 15% = 53.33

Q2. The answer is 2.8425

The initial number 18.95 and it is 100%. How much is its 15%? Make a proportion:

If 18.95 is 100%, what number is 15% of it?

18.95 : 100% = x : 15%

x * 100% = 18.95 * 15%

x = 18.95 * 15% / 100% = 2.8425

Q3. The answer is 509.375%

The initial number is 64 and it is 100%. So, what percent is 326? Make a proportion:

If 64 is 100%, 326 is what percent?

64 : 100% = 326 : x

x * 64 = 326 * 100%

x = 326 * 100% / 64 = 509.375%

Q4. The answer is 400.

The initial number is 100%. Make a proportion:

If 40 is 10%, what number is 100%?

40 : 10% = x : 100%

x * 10% = 40 * 100%

x = 40 * 100% / 10%

x = 400