21.1 is what percent of 54.4 - 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 54.4 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 54.4, so we can write it down as 100%=54.4.
4. We know, that x% equals 21.1 of the output value, so we can write it down as x%=21.1.
5. Now we have two simple equations:
1) 100%=54.4
2) x%=21.1
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%=54.4/21.1
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.1 is what percent of 54.4

100%/x%=54.4/21.1
(100/x)*x=(54.4/21.1)*x       - we multiply both sides of the equation by x
100=2.5781990521327*x       - we divide both sides of the equation by (2.5781990521327) to get x
100/2.5781990521327=x
38.786764705882=x
x=38.786764705882

now we have:
21.1 is 38.786764705882% of 54.4