81.6 is what percent of 100 - 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 100 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 100, so we can write it down as 100%=100.
4. We know, that x% equals 81.6 of the output value, so we can write it down as x%=81.6.
5. Now we have two simple equations:
1) 100%=100
2) x%=81.6
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%=100/81.6
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81.6 is what percent of 100

100%/x%=100/81.6
(100/x)*x=(100/81.6)*x       - we multiply both sides of the equation by x
100=1.2254901960784*x       - we divide both sides of the equation by (1.2254901960784) to get x
100/1.2254901960784=x
81.6=x
x=81.6

now we have:
81.6 is 81.6% of 100