20 is what percent of 1018 - 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 1018 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 1018, so we can write it down as 100%=1018.
4. We know, that x% equals 20 of the output value, so we can write it down as x%=20.
5. Now we have two simple equations:
1) 100%=1018
2) x%=20
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%=1018/20
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 20 is what percent of 1018

100%/x%=1018/20
(100/x)*x=(1018/20)*x       - we multiply both sides of the equation by x
100=50.9*x       - we divide both sides of the equation by (50.9) to get x
100/50.9=x
1.9646365422397=x
x=1.9646365422397

now we have:
20 is 1.9646365422397% of 1018