815.5 is what percent of 1018 - 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 1018 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 1018, so we can write it down as 100%=1018.
4. We know, that x% equals 815.5 of the output value, so we can write it down as x%=815.5.
5. Now we have two simple equations:
1) 100%=1018
2) x%=815.5
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%=1018/815.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 815.5 is what percent of 1018

100%/x%=1018/815.5
(100/x)*x=(1018/815.5)*x       - we multiply both sides of the equation by x
100=1.2483139178418*x       - we divide both sides of the equation by (1.2483139178418) to get x
100/1.2483139178418=x
80.108055009823=x
x=80.108055009823

now we have:
815.5 is 80.108055009823% of 1018