89 is what percent of 646 - 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 646 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 646, so we can write it down as 100%=646.
4. We know, that x% equals 89 of the output value, so we can write it down as x%=89.
5. Now we have two simple equations:
1) 100%=646
2) x%=89
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%=646/89
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 89 is what percent of 646

100%/x%=646/89
(100/x)*x=(646/89)*x       - we multiply both sides of the equation by x
100=7.2584269662921*x       - we divide both sides of the equation by (7.2584269662921) to get x
100/7.2584269662921=x
13.777089783282=x
x=13.777089783282

now we have:
89 is 13.777089783282% of 646