90.5 is what percent of 671.5 - 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 671.5 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 671.5, so we can write it down as 100%=671.5.
4. We know, that x% equals 90.5 of the output value, so we can write it down as x%=90.5.
5. Now we have two simple equations:
1) 100%=671.5
2) x%=90.5
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%=671.5/90.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 90.5 is what percent of 671.5

100%/x%=671.5/90.5
(100/x)*x=(671.5/90.5)*x       - we multiply both sides of the equation by x
100=7.4198895027624*x       - we divide both sides of the equation by (7.4198895027624) to get x
100/7.4198895027624=x
13.477289650037=x
x=13.477289650037

now we have:
90.5 is 13.477289650037% of 671.5