31.9 is what percent of 151 - 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 151 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 151, so we can write it down as 100%=151.
4. We know, that x% equals 31.9 of the output value, so we can write it down as x%=31.9.
5. Now we have two simple equations:
1) 100%=151
2) x%=31.9
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%=151/31.9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 31.9 is what percent of 151

100%/x%=151/31.9
(100/x)*x=(151/31.9)*x       - we multiply both sides of the equation by x
100=4.7335423197492*x       - we divide both sides of the equation by (4.7335423197492) to get x
100/4.7335423197492=x
21.12582781457=x
x=21.12582781457

now we have:
31.9 is 21.12582781457% of 151