80 is what percent of 728 - 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 728 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 728, so we can write it down as 100%=728.
4. We know, that x% equals 80 of the output value, so we can write it down as x%=80.
5. Now we have two simple equations:
1) 100%=728
2) x%=80
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%=728/80
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 80 is what percent of 728

100%/x%=728/80
(100/x)*x=(728/80)*x       - we multiply both sides of the equation by x
100=9.1*x       - we divide both sides of the equation by (9.1) to get x
100/9.1=x
10.989010989011=x
x=10.989010989011

now we have:
80 is 10.989010989011% of 728