79 is what percent of 391.5 - 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 391.5 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 391.5, so we can write it down as 100%=391.5.
4. We know, that x% equals 79 of the output value, so we can write it down as x%=79.
5. Now we have two simple equations:
1) 100%=391.5
2) x%=79
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%=391.5/79
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 79 is what percent of 391.5

100%/x%=391.5/79
(100/x)*x=(391.5/79)*x       - we multiply both sides of the equation by x
100=4.9556962025316*x       - we divide both sides of the equation by (4.9556962025316) to get x
100/4.9556962025316=x
20.178799489144=x
x=20.178799489144

now we have:
79 is 20.178799489144% of 391.5