629.74 is what percent of 815.5 - 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 815.5 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 815.5, so we can write it down as 100%=815.5.
4. We know, that x% equals 629.74 of the output value, so we can write it down as x%=629.74.
5. Now we have two simple equations:
1) 100%=815.5
2) x%=629.74
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%=815.5/629.74
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 629.74 is what percent of 815.5

100%/x%=815.5/629.74
(100/x)*x=(815.5/629.74)*x       - we multiply both sides of the equation by x
100=1.2949788801728*x       - we divide both sides of the equation by (1.2949788801728) to get x
100/1.2949788801728=x
77.221336603311=x
x=77.221336603311

now we have:
629.74 is 77.221336603311% of 815.5