51 is what percent of 139 - 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 139 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 139, so we can write it down as 100%=139.
4. We know, that x% equals 51 of the output value, so we can write it down as x%=51.
5. Now we have two simple equations:
1) 100%=139
2) x%=51
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%=139/51
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 51 is what percent of 139

100%/x%=139/51
(100/x)*x=(139/51)*x       - we multiply both sides of the equation by x
100=2.7254901960784*x       - we divide both sides of the equation by (2.7254901960784) to get x
100/2.7254901960784=x
36.690647482014=x
x=36.690647482014

now we have:
51 is 36.690647482014% of 139