Question

9 is 25% of what number

Answer 1

36 if you divide 36 by 25% you get 9

Answer 2

Basic info:
is means =
% means 1/100
of means *

let "what number" be x.
According to the info let's set the equation:

9 = 25% * x
9 = 25/100 * x

Multiply both sides by 100:
900 = 25x

Divide both sides by 25
900/25 = x
x = 36

So the unknown number is 36.
9 = 25% * 36
9 is 25% of 36

//Hope this helps