81.05 is what percent of 109 - 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 109 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 109, so we can write it down as 100%=109.
4. We know, that x% equals 81.05 of the output value, so we can write it down as x%=81.05.
5. Now we have two simple equations:
1) 100%=109
2) x%=81.05
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%=109/81.05
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81.05 is what percent of 109

100%/x%=109/81.05
(100/x)*x=(109/81.05)*x       - we multiply both sides of the equation by x
100=1.3448488587292*x       - we divide both sides of the equation by (1.3448488587292) to get x
100/1.3448488587292=x
74.357798165138=x
x=74.357798165138

now we have:
81.05 is 74.357798165138% of 109