What is 80 percent of 12.784 - 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 12.784 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 12.784 is 100%, so we can write it down as 12.784=100%.
4. We know, that x is 80% of the output value, so we can write it down as x=80%.
5. Now we have two simple equations:
1) 12.784=100%
2) x=80%
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:
12.784/x=100%/80%
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 80% of 12.784

12.784/x=100/80
(12.784/x)*x=(100/80)*x       - we multiply both sides of the equation by x
12.784=1.25*x       - we divide both sides of the equation by (1.25) to get x
12.784/1.25=x
10.2272=x
x=10.2272

now we have:
80% of 12.784=10.2272