21 is what percent of 655.02 - 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 655.02 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 655.02, so we can write it down as 100%=655.02.
4. We know, that x% equals 21 of the output value, so we can write it down as x%=21.
5. Now we have two simple equations:
1) 100%=655.02
2) x%=21
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%=655.02/21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21 is what percent of 655.02

100%/x%=655.02/21
(100/x)*x=(655.02/21)*x       - we multiply both sides of the equation by x
100=31.191428571429*x       - we divide both sides of the equation by (31.191428571429) to get x
100/31.191428571429=x
3.2060089768251=x
x=3.2060089768251

now we have:
21 is 3.2060089768251% of 655.02