40 is what percent of 1002 - 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 1002 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 1002, so we can write it down as 100%=1002.
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%=1002
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%=1002/40
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 1002

100%/x%=1002/40
(100/x)*x=(1002/40)*x       - we multiply both sides of the equation by x
100=25.05*x       - we divide both sides of the equation by (25.05) to get x
100/25.05=x
3.9920159680639=x
x=3.9920159680639

now we have:
40 is 3.9920159680639% of 1002