What is 0.039 percent of 13 - 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 13 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 13 is 100%, so we can write it down as 13=100%.
4. We know, that x is 0.039% of the output value, so we can write it down as x=0.039%.
5. Now we have two simple equations:
1) 13=100%
2) x=0.039%
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:
13/x=100%/0.039%
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 0.039% of 13

13/x=100/0.039
(13/x)*x=(100/0.039)*x       - we multiply both sides of the equation by x
13=2564.1025641026*x       - we divide both sides of the equation by (2564.1025641026) to get x
13/2564.1025641026=x
0.00507=x
x=0.00507

now we have:
0.039% of 13=0.00507