213.5 is what percent of 251 - 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 251 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 251, so we can write it down as 100%=251.
4. We know, that x% equals 213.5 of the output value, so we can write it down as x%=213.5.
5. Now we have two simple equations:
1) 100%=251
2) x%=213.5
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%=251/213.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 213.5 is what percent of 251

100%/x%=251/213.5
(100/x)*x=(251/213.5)*x       - we multiply both sides of the equation by x
100=1.175644028103*x       - we divide both sides of the equation by (1.175644028103) to get x
100/1.175644028103=x
85.059760956175=x
x=85.059760956175

now we have:
213.5 is 85.059760956175% of 251