102.6 is what percent of 128.9 - 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 128.9 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 128.9, so we can write it down as 100%=128.9.
4. We know, that x% equals 102.6 of the output value, so we can write it down as x%=102.6.
5. Now we have two simple equations:
1) 100%=128.9
2) x%=102.6
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%=128.9/102.6
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 102.6 is what percent of 128.9

100%/x%=128.9/102.6
(100/x)*x=(128.9/102.6)*x       - we multiply both sides of the equation by x
100=1.2563352826511*x       - we divide both sides of the equation by (1.2563352826511) to get x
100/1.2563352826511=x
79.596586501164=x
x=79.596586501164

now we have:
102.6 is 79.596586501164% of 128.9