What is 0.00021 percent of 9000 - 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 9000 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 9000 is 100%, so we can write it down as 9000=100%.
4. We know, that x is 0.00021% of the output value, so we can write it down as x=0.00021%.
5. Now we have two simple equations:
1) 9000=100%
2) x=0.00021%
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:
9000/x=100%/0.00021%
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 0.00021% of 9000

9000/x=100/0.00021
(9000/x)*x=(100/0.00021)*x       - we multiply both sides of the equation by x
9000=476190.47619048*x       - we divide both sides of the equation by (476190.47619048) to get x
9000/476190.47619048=x
0.0189=x
x=0.0189

now we have:
0.00021% of 9000=0.0189