87 is what percent of 1140 - 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 1140 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 1140, so we can write it down as 100%=1140.
4. We know, that x% equals 87 of the output value, so we can write it down as x%=87.
5. Now we have two simple equations:
1) 100%=1140
2) x%=87
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%=1140/87
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 87 is what percent of 1140

100%/x%=1140/87
(100/x)*x=(1140/87)*x       - we multiply both sides of the equation by x
100=13.103448275862*x       - we divide both sides of the equation by (13.103448275862) to get x
100/13.103448275862=x
7.6315789473684=x
x=7.6315789473684

now we have:
87 is 7.6315789473684% of 1140