What is 0.0013 percent of 645.5 - 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 645.5 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 645.5 is 100%, so we can write it down as 645.5=100%.
4. We know, that x is 0.0013% of the output value, so we can write it down as x=0.0013%.
5. Now we have two simple equations:
1) 645.5=100%
2) x=0.0013%
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:
645.5/x=100%/0.0013%
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 0.0013% of 645.5

645.5/x=100/0.0013
(645.5/x)*x=(100/0.0013)*x       - we multiply both sides of the equation by x
645.5=76923.076923077*x       - we divide both sides of the equation by (76923.076923077) to get x
645.5/76923.076923077=x
0.0083915=x
x=0.0083915

now we have:
0.0013% of 645.5=0.0083915