What is 3.2 percent of 640000 - 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 640000 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 640000 is 100%, so we can write it down as 640000=100%.
4. We know, that x is 3.2% of the output value, so we can write it down as x=3.2%.
5. Now we have two simple equations:
1) 640000=100%
2) x=3.2%
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:
640000/x=100%/3.2%
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 3.2% of 640000

640000/x=100/3.2
(640000/x)*x=(100/3.2)*x       - we multiply both sides of the equation by x
640000=31.25*x       - we divide both sides of the equation by (31.25) to get x
640000/31.25=x
20480=x
x=20480

now we have:
3.2% of 640000=20480