641.25 is what percent of 7.5 - 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 7.5 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 7.5, so we can write it down as 100%=7.5.
4. We know, that x% equals 641.25 of the output value, so we can write it down as x%=641.25.
5. Now we have two simple equations:
1) 100%=7.5
2) x%=641.25
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%=7.5/641.25
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 641.25 is what percent of 7.5

100%/x%=7.5/641.25
(100/x)*x=(7.5/641.25)*x       - we multiply both sides of the equation by x
100=0.011695906432749*x       - we divide both sides of the equation by (0.011695906432749) to get x
100/0.011695906432749=x
8550=x
x=8550

now we have:
641.25 is 8550% of 7.5