523.8 is what percent of 9990 - 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 9990 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 9990, so we can write it down as 100%=9990.
4. We know, that x% equals 523.8 of the output value, so we can write it down as x%=523.8.
5. Now we have two simple equations:
1) 100%=9990
2) x%=523.8
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%=9990/523.8
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 523.8 is what percent of 9990

100%/x%=9990/523.8
(100/x)*x=(9990/523.8)*x       - we multiply both sides of the equation by x
100=19.072164948454*x       - we divide both sides of the equation by (19.072164948454) to get x
100/19.072164948454=x
5.2432432432432=x
x=5.2432432432432

now we have:
523.8 is 5.2432432432432% of 9990