638.4 is what percent of 760 - 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 760 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 760, so we can write it down as 100%=760.
4. We know, that x% equals 638.4 of the output value, so we can write it down as x%=638.4.
5. Now we have two simple equations:
1) 100%=760
2) x%=638.4
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%=760/638.4
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 638.4 is what percent of 760

100%/x%=760/638.4
(100/x)*x=(760/638.4)*x       - we multiply both sides of the equation by x
100=1.1904761904762*x       - we divide both sides of the equation by (1.1904761904762) to get x
100/1.1904761904762=x
84=x
x=84

now we have:
638.4 is 84% of 760