630.4 is what percent of 7880 - 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 7880 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 7880, so we can write it down as 100%=7880.
4. We know, that x% equals 630.4 of the output value, so we can write it down as x%=630.4.
5. Now we have two simple equations:
1) 100%=7880
2) x%=630.4
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%=7880/630.4
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 630.4 is what percent of 7880

100%/x%=7880/630.4
(100/x)*x=(7880/630.4)*x       - we multiply both sides of the equation by x
100=12.5*x       - we divide both sides of the equation by (12.5) to get x
100/12.5=x
8=x
x=8

now we have:
630.4 is 8% of 7880