128.8 is what percent of 775 - 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 775 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 775, so we can write it down as 100%=775.
4. We know, that x% equals 128.8 of the output value, so we can write it down as x%=128.8.
5. Now we have two simple equations:
1) 100%=775
2) x%=128.8
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%=775/128.8
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 128.8 is what percent of 775

100%/x%=775/128.8
(100/x)*x=(775/128.8)*x       - we multiply both sides of the equation by x
100=6.0170807453416*x       - we divide both sides of the equation by (6.0170807453416) to get x
100/6.0170807453416=x
16.61935483871=x
x=16.61935483871

now we have:
128.8 is 16.61935483871% of 775