What is 0.39 percent of 19.85 - 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 19.85 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 19.85 is 100%, so we can write it down as 19.85=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) 19.85=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:
19.85/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 19.85

19.85/x=100/0.39
(19.85/x)*x=(100/0.39)*x       - we multiply both sides of the equation by x
19.85=256.41025641026*x       - we divide both sides of the equation by (256.41025641026) to get x
19.85/256.41025641026=x
0.077415=x
x=0.077415

now we have:
0.39% of 19.85=0.077415