129.35 is what percent of 218.4 - 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 218.4 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 218.4, so we can write it down as 100%=218.4.
4. We know, that x% equals 129.35 of the output value, so we can write it down as x%=129.35.
5. Now we have two simple equations:
1) 100%=218.4
2) x%=129.35
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%=218.4/129.35
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 129.35 is what percent of 218.4

100%/x%=218.4/129.35
(100/x)*x=(218.4/129.35)*x       - we multiply both sides of the equation by x
100=1.6884422110553*x       - we divide both sides of the equation by (1.6884422110553) to get x
100/1.6884422110553=x
59.22619047619=x
x=59.22619047619

now we have:
129.35 is 59.22619047619% of 218.4