21.2 is what percent of 28.2 - 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 28.2 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 28.2, so we can write it down as 100%=28.2.
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%=28.2
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%=28.2/21.2
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 28.2

100%/x%=28.2/21.2
(100/x)*x=(28.2/21.2)*x       - we multiply both sides of the equation by x
100=1.3301886792453*x       - we divide both sides of the equation by (1.3301886792453) to get x
100/1.3301886792453=x
75.177304964539=x
x=75.177304964539

now we have:
21.2 is 75.177304964539% of 28.2