39 is what percent of 131 - 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 131 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 131, so we can write it down as 100%=131.
4. We know, that x% equals 39 of the output value, so we can write it down as x%=39.
5. Now we have two simple equations:
1) 100%=131
2) x%=39
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%=131/39
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 39 is what percent of 131

100%/x%=131/39
(100/x)*x=(131/39)*x       - we multiply both sides of the equation by x
100=3.35897435897*x       - we divide both sides of the equation by (3.35897435897) to get x
100/3.35897435897=x
29.7709923664=x
x=29.7709923664

now we have:
39 is 29.7709923664% of 131