What is 13.15 percent of 660.78 - 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 660.78 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 660.78 is 100%, so we can write it down as 660.78=100%.
4. We know, that x is 13.15% of the output value, so we can write it down as x=13.15%.
5. Now we have two simple equations:
1) 660.78=100%
2) x=13.15%
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:
660.78/x=100%/13.15%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 13.15% of 660.78

660.78/x=100/13.15
(660.78/x)*x=(100/13.15)*x       - we multiply both sides of the equation by x
660.78=7.6045627376426*x       - we divide both sides of the equation by (7.6045627376426) to get x
660.78/7.6045627376426=x
86.89257=x
x=86.89257

now we have:
13.15% of 660.78=86.89257