21.17 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 21.17 of the output value, so we can write it down as x%=21.17.
5. Now we have two simple equations:
1) 100%=250
2) x%=21.17
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%=250/21.17
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.17 is what percent of 250

100%/x%=250/21.17
(100/x)*x=(250/21.17)*x       - we multiply both sides of the equation by x
100=11.809163911195*x       - we divide both sides of the equation by (11.809163911195) to get x
100/11.809163911195=x
8.468=x
x=8.468

now we have:
21.17 is 8.468% of 250