661.5 is what percent of 668 - 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 668 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 668, so we can write it down as 100%=668.
4. We know, that x% equals 661.5 of the output value, so we can write it down as x%=661.5.
5. Now we have two simple equations:
1) 100%=668
2) x%=661.5
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%=668/661.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 661.5 is what percent of 668

100%/x%=668/661.5
(100/x)*x=(668/661.5)*x       - we multiply both sides of the equation by x
100=1.0098261526833*x       - we divide both sides of the equation by (1.0098261526833) to get x
100/1.0098261526833=x
99.026946107784=x
x=99.026946107784

now we have:
661.5 is 99.026946107784% of 668