77.13 is what percent of 85.7 - 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 85.7 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 85.7, so we can write it down as 100%=85.7.
4. We know, that x% equals 77.13 of the output value, so we can write it down as x%=77.13.
5. Now we have two simple equations:
1) 100%=85.7
2) x%=77.13
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%=85.7/77.13
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 77.13 is what percent of 85.7

100%/x%=85.7/77.13
(100/x)*x=(85.7/77.13)*x       - we multiply both sides of the equation by x
100=1.1111111111111*x       - we divide both sides of the equation by (1.1111111111111) to get x
100/1.1111111111111=x
90=x
x=90

now we have:
77.13 is 90% of 85.7