21 is what percent of 39.352 - 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 39.352 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 39.352, so we can write it down as 100%=39.352.
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%=39.352
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%=39.352/21
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 39.352

100%/x%=39.352/21
(100/x)*x=(39.352/21)*x       - we multiply both sides of the equation by x
100=1.8739047619048*x       - we divide both sides of the equation by (1.8739047619048) to get x
100/1.8739047619048=x
53.364504980687=x
x=53.364504980687

now we have:
21 is 53.364504980687% of 39.352