21.95 is what percent of 27.9 - 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 27.9 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 27.9, so we can write it down as 100%=27.9.
4. We know, that x% equals 21.95 of the output value, so we can write it down as x%=21.95.
5. Now we have two simple equations:
1) 100%=27.9
2) x%=21.95
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%=27.9/21.95
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.95 is what percent of 27.9

100%/x%=27.9/21.95
(100/x)*x=(27.9/21.95)*x       - we multiply both sides of the equation by x
100=1.2710706150342*x       - we divide both sides of the equation by (1.2710706150342) to get x
100/1.2710706150342=x
78.673835125448=x
x=78.673835125448

now we have:
21.95 is 78.673835125448% of 27.9