What is 0.42 percent of 21.84 - 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 21.84 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 21.84 is 100%, so we can write it down as 21.84=100%.
4. We know, that x is 0.42% of the output value, so we can write it down as x=0.42%.
5. Now we have two simple equations:
1) 21.84=100%
2) x=0.42%
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:
21.84/x=100%/0.42%
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 0.42% of 21.84

21.84/x=100/0.42
(21.84/x)*x=(100/0.42)*x       - we multiply both sides of the equation by x
21.84=238.09523809524*x       - we divide both sides of the equation by (238.09523809524) to get x
21.84/238.09523809524=x
0.091728=x
x=0.091728

now we have:
0.42% of 21.84=0.091728