40 is what percent of 31.018 - 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 31.018 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 31.018, so we can write it down as 100%=31.018.
4. We know, that x% equals 40 of the output value, so we can write it down as x%=40.
5. Now we have two simple equations:
1) 100%=31.018
2) x%=40
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%=31.018/40
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 40 is what percent of 31.018

100%/x%=31.018/40
(100/x)*x=(31.018/40)*x       - we multiply both sides of the equation by x
100=0.77545*x       - we divide both sides of the equation by (0.77545) to get x
100/0.77545=x
128.95737958605=x
x=128.95737958605

now we have:
40 is 128.95737958605% of 31.018