393.93 is what percent of 509.7 - 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 509.7 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 509.7, so we can write it down as 100%=509.7.
4. We know, that x% equals 393.93 of the output value, so we can write it down as x%=393.93.
5. Now we have two simple equations:
1) 100%=509.7
2) x%=393.93
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%=509.7/393.93
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 393.93 is what percent of 509.7

100%/x%=509.7/393.93
(100/x)*x=(509.7/393.93)*x       - we multiply both sides of the equation by x
100=1.2938847003275*x       - we divide both sides of the equation by (1.2938847003275) to get x
100/1.2938847003275=x
77.286639199529=x
x=77.286639199529

now we have:
393.93 is 77.286639199529% of 509.7