129.65 is what percent of 18 - 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 18 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 18, so we can write it down as 100%=18.
4. We know, that x% equals 129.65 of the output value, so we can write it down as x%=129.65.
5. Now we have two simple equations:
1) 100%=18
2) x%=129.65
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%=18/129.65
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 129.65 is what percent of 18

100%/x%=18/129.65
(100/x)*x=(18/129.65)*x       - we multiply both sides of the equation by x
100=0.13883532587736*x       - we divide both sides of the equation by (0.13883532587736) to get x
100/0.13883532587736=x
720.27777777778=x
x=720.27777777778

now we have:
129.65 is 720.27777777778% of 18