641 is what percent of 980 - 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 980 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 980, so we can write it down as 100%=980.
4. We know, that x% equals 641 of the output value, so we can write it down as x%=641.
5. Now we have two simple equations:
1) 100%=980
2) x%=641
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%=980/641
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 641 is what percent of 980

100%/x%=980/641
(100/x)*x=(980/641)*x       - we multiply both sides of the equation by x
100=1.5288611544462*x       - we divide both sides of the equation by (1.5288611544462) to get x
100/1.5288611544462=x
65.408163265306=x
x=65.408163265306

now we have:
641 is 65.408163265306% of 980