512.5 is what percent of 20500 - 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 20500 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 20500, so we can write it down as 100%=20500.
4. We know, that x% equals 512.5 of the output value, so we can write it down as x%=512.5.
5. Now we have two simple equations:
1) 100%=20500
2) x%=512.5
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%=20500/512.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 512.5 is what percent of 20500

100%/x%=20500/512.5
(100/x)*x=(20500/512.5)*x       - we multiply both sides of the equation by x
100=40*x       - we divide both sides of the equation by (40) to get x
100/40=x
2.5=x
x=2.5

now we have:
512.5 is 2.5% of 20500