1. We assume, that the number 12.5 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 12.5, so we can write it down as 100%=12.5.
4. We know, that x% equals 8 of the output value, so we can write it down as x%=8.
5. Now we have two simple equations:
1) 100%=12.5
2) x%=8
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%=12.5/8
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for 8 is what percent of 12.5
100%/x%=12.5/8
(100/x)*x=(12.5/8)*x - we multiply both sides of the equation by x
100=1.5625*x - we divide both sides of the equation by (1.5625) to get x
100/1.5625=x
64=x
x=64
now we have:
8 is 64% of 12.5
