What is 66.6666666667 percent of 6.39 - 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 6.39 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 6.39 is 100%, so we can write it down as 6.39=100%.
4. We know, that x is 66.6666666667% of the output value, so we can write it down as x=66.6666666667%.
5. Now we have two simple equations:
1) 6.39=100%
2) x=66.6666666667%
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:
6.39/x=100%/66.6666666667%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 66.6666666667% of 6.39

6.39/x=100/66.6666666667
(6.39/x)*x=(100/66.6666666667)*x       - we multiply both sides of the equation by x
6.39=1.4999999999993*x       - we divide both sides of the equation by (1.4999999999993) to get x
6.39/1.4999999999993=x
4.2600000000021=x
x=4.2600000000021

now we have:
66.6666666667% of 6.39=4.2600000000021