81.5 is what percent of 165.8 - 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 165.8 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 165.8, so we can write it down as 100%=165.8.
4. We know, that x% equals 81.5 of the output value, so we can write it down as x%=81.5.
5. Now we have two simple equations:
1) 100%=165.8
2) x%=81.5
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%=165.8/81.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81.5 is what percent of 165.8

100%/x%=165.8/81.5
(100/x)*x=(165.8/81.5)*x       - we multiply both sides of the equation by x
100=2.0343558282209*x       - we divide both sides of the equation by (2.0343558282209) to get x
100/2.0343558282209=x
49.155609167672=x
x=49.155609167672

now we have:
81.5 is 49.155609167672% of 165.8