What is 72.8 percent of 28 - 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 28 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 28 is 100%, so we can write it down as 28=100%.
4. We know, that x is 72.8% of the output value, so we can write it down as x=72.8%.
5. Now we have two simple equations:
1) 28=100%
2) x=72.8%
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:
28/x=100%/72.8%
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 72.8% of 28

28/x=100/72.8
(28/x)*x=(100/72.8)*x       - we multiply both sides of the equation by x
28=1.3736263736264*x       - we divide both sides of the equation by (1.3736263736264) to get x
28/1.3736263736264=x
20.384=x
x=20.384

now we have:
72.8% of 28=20.384