68.5 is what percent of 81 - 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 81 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 81, so we can write it down as 100%=81.
4. We know, that x% equals 68.5 of the output value, so we can write it down as x%=68.5.
5. Now we have two simple equations:
1) 100%=81
2) x%=68.5
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%=81/68.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 68.5 is what percent of 81

100%/x%=81/68.5
(100/x)*x=(81/68.5)*x       - we multiply both sides of the equation by x
100=1.1824817518248*x       - we divide both sides of the equation by (1.1824817518248) to get x
100/1.1824817518248=x
84.567901234568=x
x=84.567901234568

now we have:
68.5 is 84.567901234568% of 81