63.5 is what percent of 661 - 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 661 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 661, so we can write it down as 100%=661.
4. We know, that x% equals 63.5 of the output value, so we can write it down as x%=63.5.
5. Now we have two simple equations:
1) 100%=661
2) x%=63.5
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%=661/63.5
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 63.5 is what percent of 661

100%/x%=661/63.5
(100/x)*x=(661/63.5)*x       - we multiply both sides of the equation by x
100=10.409448818898*x       - we divide both sides of the equation by (10.409448818898) to get x
100/10.409448818898=x
9.606656580938=x
x=9.606656580938

now we have:
63.5 is 9.606656580938% of 661