138.25 is what percent of 170 - 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 170 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 170, so we can write it down as 100%=170.
4. We know, that x% equals 138.25 of the output value, so we can write it down as x%=138.25.
5. Now we have two simple equations:
1) 100%=170
2) x%=138.25
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%=170/138.25
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 138.25 is what percent of 170

100%/x%=170/138.25
(100/x)*x=(170/138.25)*x       - we multiply both sides of the equation by x
100=1.2296564195298*x       - we divide both sides of the equation by (1.2296564195298) to get x
100/1.2296564195298=x
81.323529411765=x
x=81.323529411765

now we have:
138.25 is 81.323529411765% of 170