How to solve Percentage problem

What is Percentage : a percentage is a way of expressing a number as a fraction

Here is one simple example which shows , how to solve percentage problem for a number based on a different number .

Problem:

36 is 20 percent of what number?


Solution:

Let the number be X.

36=20% of X

     20
36=  ________  * x   (20*5 =100,so 100 replace as 5)
     100

     1
36=  ______  * x
     5

Multiply with 5 on both sides.

            1
5 * 36= 5 * _____ * x
            5


5 get canceled since 5 times 1 = 5.


5*36 = x

So , x=180