387.9 is what percent of 720 - 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 720 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 720, so we can write it down as 100%=720.
4. We know, that x% equals 387.9 of the output value, so we can write it down as x%=387.9.
5. Now we have two simple equations:
1) 100%=720
2) x%=387.9
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%=720/387.9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 387.9 is what percent of 720

100%/x%=720/387.9
(100/x)*x=(720/387.9)*x       - we multiply both sides of the equation by x
100=1.8561484918794*x       - we divide both sides of the equation by (1.8561484918794) to get x
100/1.8561484918794=x
53.875=x
x=53.875

now we have:
387.9 is 53.875% of 720