What is 15.21 percent of 7.8 - 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 7.8 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 7.8 is 100%, so we can write it down as 7.8=100%.
4. We know, that x is 15.21% of the output value, so we can write it down as x=15.21%.
5. Now we have two simple equations:
1) 7.8=100%
2) x=15.21%
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:
7.8/x=100%/15.21%
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 15.21% of 7.8

7.8/x=100/15.21
(7.8/x)*x=(100/15.21)*x       - we multiply both sides of the equation by x
7.8=6.5746219592373*x       - we divide both sides of the equation by (6.5746219592373) to get x
7.8/6.5746219592373=x
1.18638=x
x=1.18638

now we have:
15.21% of 7.8=1.18638