68 is what percent of 172.8 - 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 172.8 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 172.8, so we can write it down as 100%=172.8.
4. We know, that x% equals 68 of the output value, so we can write it down as x%=68.
5. Now we have two simple equations:
1) 100%=172.8
2) x%=68
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%=172.8/68
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 68 is what percent of 172.8

100%/x%=172.8/68
(100/x)*x=(172.8/68)*x       - we multiply both sides of the equation by x
100=2.5411764705882*x       - we divide both sides of the equation by (2.5411764705882) to get x
100/2.5411764705882=x
39.351851851852=x
x=39.351851851852

now we have:
68 is 39.351851851852% of 172.8