4.16 is what percent of 640 - 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 640 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 640, so we can write it down as 100%=640.
4. We know, that x% equals 4.16 of the output value, so we can write it down as x%=4.16.
5. Now we have two simple equations:
1) 100%=640
2) x%=4.16
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%=640/4.16
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 4.16 is what percent of 640

100%/x%=640/4.16
(100/x)*x=(640/4.16)*x       - we multiply both sides of the equation by x
100=153.84615384615*x       - we divide both sides of the equation by (153.84615384615) to get x
100/153.84615384615=x
0.65=x
x=0.65

now we have:
4.16 is 0.65% of 640