68 is what percent of 309.5 - 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 309.5 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 309.5, so we can write it down as 100%=309.5.
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%=309.5
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%=309.5/68
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 309.5

100%/x%=309.5/68
(100/x)*x=(309.5/68)*x       - we multiply both sides of the equation by x
100=4.5514705882353*x       - we divide both sides of the equation by (4.5514705882353) to get x
100/4.5514705882353=x
21.970920840065=x
x=21.970920840065

now we have:
68 is 21.970920840065% of 309.5