The equation below could be used to solve which of the following problems?
25 = (0.65) w
twenty-five is 65% of what number?
what is 65% of 25?
what percent is 25 of 65?
sixty-five percent of 25 is what number?

The answer is A. Twenty-five is 65% of what number?
Why? This is due to how if you multiply 'w'(the number) by 0.65(65%) then you get 25. This indicates that whatever the number is, if it is multiplied by 65% it equals 25. Thus concluding that 25 is 65% of the unknown number.

I hope that helps, have a great rest of your day! ^ ^
{-Ghostgate-}

For these problems, translate key words to operators in an equation:
"is" refers to an equal sign.
"of" refers to multiplication.
letters or variables refer to "what number"

25 = (.65)*w    >  25 is 65% of what number