What is 13.9 percent of 21.8 - 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 21.8 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 21.8 is 100%, so we can write it down as 21.8=100%.
4. We know, that x is 13.9% of the output value, so we can write it down as x=13.9%.
5. Now we have two simple equations:
1) 21.8=100%
2) x=13.9%
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:
21.8/x=100%/13.9%
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 13.9% of 21.8

21.8/x=100/13.9
(21.8/x)*x=(100/13.9)*x       - we multiply both sides of the equation by x
21.8=7.1942446043165*x       - we divide both sides of the equation by (7.1942446043165) to get x
21.8/7.1942446043165=x
3.0302=x
x=3.0302

now we have:
13.9% of 21.8=3.0302