63.8 is what percent of 64.4 - 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 64.4 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 64.4, so we can write it down as 100%=64.4.
4. We know, that x% equals 63.8 of the output value, so we can write it down as x%=63.8.
5. Now we have two simple equations:
1) 100%=64.4
2) x%=63.8
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%=64.4/63.8
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 63.8 is what percent of 64.4

100%/x%=64.4/63.8
(100/x)*x=(64.4/63.8)*x       - we multiply both sides of the equation by x
100=1.0094043887147*x       - we divide both sides of the equation by (1.0094043887147) to get x
100/1.0094043887147=x
99.068322981366=x
x=99.068322981366

now we have:
63.8 is 99.068322981366% of 64.4