83.5 is what percent of 12900 - 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 12900 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 12900, so we can write it down as 100%=12900.
4. We know, that x% equals 83.5 of the output value, so we can write it down as x%=83.5.
5. Now we have two simple equations:
1) 100%=12900
2) x%=83.5
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%=12900/83.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 83.5 is what percent of 12900

100%/x%=12900/83.5
(100/x)*x=(12900/83.5)*x       - we multiply both sides of the equation by x
100=154.49101796407*x       - we divide both sides of the equation by (154.49101796407) to get x
100/154.49101796407=x
0.64728682170543=x
x=0.64728682170543

now we have:
83.5 is 0.64728682170543% of 12900