15 is what percent of 12200 - 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 12200 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 12200, so we can write it down as 100%=12200.
4. We know, that x% equals 15 of the output value, so we can write it down as x%=15.
5. Now we have two simple equations:
1) 100%=12200
2) x%=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%=12200/15
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 15 is what percent of 12200

100%/x%=12200/15
(100/x)*x=(12200/15)*x       - we multiply both sides of the equation by x
100=813.33333333333*x       - we divide both sides of the equation by (813.33333333333) to get x
100/813.33333333333=x
0.12295081967213=x
x=0.12295081967213

now we have:
15 is 0.12295081967213% of 12200