What is 2.1 percent of 403.2 - 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 403.2 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 403.2 is 100%, so we can write it down as 403.2=100%.
4. We know, that x is 2.1% of the output value, so we can write it down as x=2.1%.
5. Now we have two simple equations:
1) 403.2=100%
2) x=2.1%
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:
403.2/x=100%/2.1%
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 2.1% of 403.2

403.2/x=100/2.1
(403.2/x)*x=(100/2.1)*x       - we multiply both sides of the equation by x
403.2=47.619047619048*x       - we divide both sides of the equation by (47.619047619048) to get x
403.2/47.619047619048=x
8.4672=x
x=8.4672

now we have:
2.1% of 403.2=8.4672