13 is what percent of 2157 - 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 2157 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 2157, so we can write it down as 100%=2157.
4. We know, that x% equals 13 of the output value, so we can write it down as x%=13.
5. Now we have two simple equations:
1) 100%=2157
2) x%=13
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%=2157/13
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 13 is what percent of 2157

100%/x%=2157/13
(100/x)*x=(2157/13)*x       - we multiply both sides of the equation by x
100=165.92307692308*x       - we divide both sides of the equation by (165.92307692308) to get x
100/165.92307692308=x
0.60268891979601=x
x=0.60268891979601

now we have:
13 is 0.60268891979601% of 2157