21.2 is what percent of 280.9 - 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 280.9 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 100% equals 280.9, so we can write it down as 100%=280.9.
4. We know, that x% equals 21.2 of the output value, so we can write it down as x%=21.2.
5. Now we have two simple equations:
1) 100%=280.9
2) x%=21.2
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:
100%/x%=280.9/21.2
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.2 is what percent of 280.9

100%/x%=280.9/21.2
(100/x)*x=(280.9/21.2)*x       - we multiply both sides of the equation by x
100=13.25*x       - we divide both sides of the equation by (13.25) to get x
100/13.25=x
7.5471698113208=x
x=7.5471698113208

now we have:
21.2 is 7.5471698113208% of 280.9