18 is what percent of 285 - 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 285 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 285, so we can write it down as 100%=285.
4. We know, that x% equals 18 of the output value, so we can write it down as x%=18.
5. Now we have two simple equations:
1) 100%=285
2) x%=18
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%=285/18
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 18 is what percent of 285

100%/x%=285/18
(100/x)*x=(285/18)*x       - we multiply both sides of the equation by x
100=15.833333333333*x       - we divide both sides of the equation by (15.833333333333) to get x
100/15.833333333333=x
6.3157894736842=x
x=6.3157894736842

now we have:
18 is 6.3157894736842% of 285