Question

15 is 30% of what number

Answer 1

Simple,change 30% into 0.3

then

15=0.3*n

15/0.3=0.3n/0.3

50=n

Thus, your answer is, 50.

Answer 2

 The answer is 50. You can get the answer by multiplying 30 by 100 and dividing 15, getting the answer 50, 15 is 30% of 50.