64 is what percent of 83.1 - 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 83.1 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 83.1, so we can write it down as 100%=83.1.
4. We know, that x% equals 64 of the output value, so we can write it down as x%=64.
5. Now we have two simple equations:
1) 100%=83.1
2) x%=64
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%=83.1/64
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 64 is what percent of 83.1

100%/x%=83.1/64
(100/x)*x=(83.1/64)*x       - we multiply both sides of the equation by x
100=1.2984375*x       - we divide both sides of the equation by (1.2984375) to get x
100/1.2984375=x
77.015643802647=x
x=77.015643802647

now we have:
64 is 77.015643802647% of 83.1