128.7 is what percent of 90.09 - 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 90.09 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 90.09, so we can write it down as 100%=90.09.
4. We know, that x% equals 128.7 of the output value, so we can write it down as x%=128.7.
5. Now we have two simple equations:
1) 100%=90.09
2) x%=128.7
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%=90.09/128.7
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 128.7 is what percent of 90.09

100%/x%=90.09/128.7
(100/x)*x=(90.09/128.7)*x       - we multiply both sides of the equation by x
100=0.7*x       - we divide both sides of the equation by (0.7) to get x
100/0.7=x
142.85714285714=x
x=142.85714285714

now we have:
128.7 is 142.85714285714% of 90.09