13.2 is what percent of 42.4 - step by step solution

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 42.4 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 42.4, so we can write it down as 100%=42.4.
4. We know, that x% equals 13.2 of the output value, so we can write it down as x%=13.2.
5. Now we have two simple equations:
1) 100%=42.4
2) x%=13.2
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=42.4/13.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 13.2 is what percent of 42.4

100%/x%=42.4/13.2
(100/x)*x=(42.4/13.2)*x       - we multiply both sides of the equation by x
100=3.2121212121212*x       - we divide both sides of the equation by (3.2121212121212) to get x
100/3.2121212121212=x
31.132075471698=x
x=31.132075471698

now we have:
13.2 is 31.132075471698% of 42.4