315.15 is what percent of 20 - 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 20 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 20, so we can write it down as 100%=20.
4. We know, that x% equals 315.15 of the output value, so we can write it down as x%=315.15.
5. Now we have two simple equations:
1) 100%=20
2) x%=315.15
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%=20/315.15
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 315.15 is what percent of 20

100%/x%=20/315.15
(100/x)*x=(20/315.15)*x       - we multiply both sides of the equation by x
100=0.063461843566556*x       - we divide both sides of the equation by (0.063461843566556) to get x
100/0.063461843566556=x
1575.75=x
x=1575.75

now we have:
315.15 is 1575.75% of 20