What is 2.225 percent of 391.51 - 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 391.51 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 391.51 is 100%, so we can write it down as 391.51=100%.
4. We know, that x is 2.225% of the output value, so we can write it down as x=2.225%.
5. Now we have two simple equations:
1) 391.51=100%
2) x=2.225%
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:
391.51/x=100%/2.225%
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 2.225% of 391.51

391.51/x=100/2.225
(391.51/x)*x=(100/2.225)*x       - we multiply both sides of the equation by x
391.51=44.943820224719*x       - we divide both sides of the equation by (44.943820224719) to get x
391.51/44.943820224719=x
8.7110975=x
x=8.7110975

now we have:
2.225% of 391.51=8.7110975