21.16 is what percent of 31.99 - 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 31.99 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 31.99, so we can write it down as 100%=31.99.
4. We know, that x% equals 21.16 of the output value, so we can write it down as x%=21.16.
5. Now we have two simple equations:
1) 100%=31.99
2) x%=21.16
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%=31.99/21.16
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.16 is what percent of 31.99

100%/x%=31.99/21.16
(100/x)*x=(31.99/21.16)*x       - we multiply both sides of the equation by x
100=1.5118147448015*x       - we divide both sides of the equation by (1.5118147448015) to get x
100/1.5118147448015=x
66.145670522038=x
x=66.145670522038

now we have:
21.16 is 66.145670522038% of 31.99