21.3 is what percent of 28.1 - 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 28.1 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 28.1, so we can write it down as 100%=28.1.
4. We know, that x% equals 21.3 of the output value, so we can write it down as x%=21.3.
5. Now we have two simple equations:
1) 100%=28.1
2) x%=21.3
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%=28.1/21.3
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.3 is what percent of 28.1

100%/x%=28.1/21.3
(100/x)*x=(28.1/21.3)*x       - we multiply both sides of the equation by x
100=1.3192488262911*x       - we divide both sides of the equation by (1.3192488262911) to get x
100/1.3192488262911=x
75.800711743772=x
x=75.800711743772

now we have:
21.3 is 75.800711743772% of 28.1