28 is what percent of 8138 - 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 8138 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 8138, so we can write it down as 100%=8138.
4. We know, that x% equals 28 of the output value, so we can write it down as x%=28.
5. Now we have two simple equations:
1) 100%=8138
2) x%=28
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%=8138/28
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 28 is what percent of 8138

100%/x%=8138/28
(100/x)*x=(8138/28)*x       - we multiply both sides of the equation by x
100=290.64285714286*x       - we divide both sides of the equation by (290.64285714286) to get x
100/290.64285714286=x
0.34406488080609=x
x=0.34406488080609

now we have:
28 is 0.34406488080609% of 8138