8.4 is what percent of 107.2 - 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 107.2 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 107.2, so we can write it down as 100%=107.2.
4. We know, that x% equals 8.4 of the output value, so we can write it down as x%=8.4.
5. Now we have two simple equations:
1) 100%=107.2
2) x%=8.4
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%=107.2/8.4
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 8.4 is what percent of 107.2

100%/x%=107.2/8.4
(100/x)*x=(107.2/8.4)*x       - we multiply both sides of the equation by x
100=12.761904761905*x       - we divide both sides of the equation by (12.761904761905) to get x
100/12.761904761905=x
7.8358208955224=x
x=7.8358208955224

now we have:
8.4 is 7.8358208955224% of 107.2