What is 8.21 percent of 390 - 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 390 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 390 is 100%, so we can write it down as 390=100%.
4. We know, that x is 8.21% of the output value, so we can write it down as x=8.21%.
5. Now we have two simple equations:
1) 390=100%
2) x=8.21%
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:
390/x=100%/8.21%
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 8.21% of 390

390/x=100/8.21
(390/x)*x=(100/8.21)*x       - we multiply both sides of the equation by x
390=12.180267965895*x       - we divide both sides of the equation by (12.180267965895) to get x
390/12.180267965895=x
32.019=x
x=32.019

now we have:
8.21% of 390=32.019