18.7 is what percent of 8.51 - 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 8.51 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 8.51, so we can write it down as 100%=8.51.
4. We know, that x% equals 18.7 of the output value, so we can write it down as x%=18.7.
5. Now we have two simple equations:
1) 100%=8.51
2) x%=18.7
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%=8.51/18.7
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 18.7 is what percent of 8.51

100%/x%=8.51/18.7
(100/x)*x=(8.51/18.7)*x       - we multiply both sides of the equation by x
100=0.45508021390374*x       - we divide both sides of the equation by (0.45508021390374) to get x
100/0.45508021390374=x
219.74148061105=x
x=219.74148061105

now we have:
18.7 is 219.74148061105% of 8.51