642.2 is what percent of 1087 - 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 1087 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 1087, so we can write it down as 100%=1087.
4. We know, that x% equals 642.2 of the output value, so we can write it down as x%=642.2.
5. Now we have two simple equations:
1) 100%=1087
2) x%=642.2
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%=1087/642.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 642.2 is what percent of 1087

100%/x%=1087/642.2
(100/x)*x=(1087/642.2)*x       - we multiply both sides of the equation by x
100=1.6926191217689*x       - we divide both sides of the equation by (1.6926191217689) to get x
100/1.6926191217689=x
59.080036798528=x
x=59.080036798528

now we have:
642.2 is 59.080036798528% of 1087