21.09 is what percent of 37 - 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 37 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 37, so we can write it down as 100%=37.
4. We know, that x% equals 21.09 of the output value, so we can write it down as x%=21.09.
5. Now we have two simple equations:
1) 100%=37
2) x%=21.09
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%=37/21.09
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.09 is what percent of 37

100%/x%=37/21.09
(100/x)*x=(37/21.09)*x       - we multiply both sides of the equation by x
100=1.7543859649123*x       - we divide both sides of the equation by (1.7543859649123) to get x
100/1.7543859649123=x
57=x
x=57

now we have:
21.09 is 57% of 37