18 is what percent of 101.5 - 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 101.5 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 101.5, so we can write it down as 100%=101.5.
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%=101.5
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%=101.5/18
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 101.5

100%/x%=101.5/18
(100/x)*x=(101.5/18)*x       - we multiply both sides of the equation by x
100=5.6388888888889*x       - we divide both sides of the equation by (5.6388888888889) to get x
100/5.6388888888889=x
17.733990147783=x
x=17.733990147783

now we have:
18 is 17.733990147783% of 101.5