21.12 is what percent of 250 - 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 250 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 250, so we can write it down as 100%=250.
4. We know, that x% equals 21.12 of the output value, so we can write it down as x%=21.12.
5. Now we have two simple equations:
1) 100%=250
2) x%=21.12
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%=250/21.12
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.12 is what percent of 250

100%/x%=250/21.12
(100/x)*x=(250/21.12)*x       - we multiply both sides of the equation by x
100=11.837121212121*x       - we divide both sides of the equation by (11.837121212121) to get x
100/11.837121212121=x
8.448=x
x=8.448

now we have:
21.12 is 8.448% of 250