67.39 is what percent of 391.2 - 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 391.2 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 391.2, so we can write it down as 100%=391.2.
4. We know, that x% equals 67.39 of the output value, so we can write it down as x%=67.39.
5. Now we have two simple equations:
1) 100%=391.2
2) x%=67.39
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%=391.2/67.39
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 67.39 is what percent of 391.2

100%/x%=391.2/67.39
(100/x)*x=(391.2/67.39)*x       - we multiply both sides of the equation by x
100=5.8050155809467*x       - we divide both sides of the equation by (5.8050155809467) to get x
100/5.8050155809467=x
17.226482617587=x
x=17.226482617587

now we have:
67.39 is 17.226482617587% of 391.2