What is 0.39 percent of 7.7 - 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 7.7 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 7.7 is 100%, so we can write it down as 7.7=100%.
4. We know, that x is 0.39% of the output value, so we can write it down as x=0.39%.
5. Now we have two simple equations:
1) 7.7=100%
2) x=0.39%
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:
7.7/x=100%/0.39%
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 0.39% of 7.7

7.7/x=100/0.39
(7.7/x)*x=(100/0.39)*x       - we multiply both sides of the equation by x
7.7=256.41025641026*x       - we divide both sides of the equation by (256.41025641026) to get x
7.7/256.41025641026=x
0.03003=x
x=0.03003

now we have:
0.39% of 7.7=0.03003