What is 28.7 percent of 12690 - 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 12690 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 12690 is 100%, so we can write it down as 12690=100%.
4. We know, that x is 28.7% of the output value, so we can write it down as x=28.7%.
5. Now we have two simple equations:
1) 12690=100%
2) x=28.7%
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:
12690/x=100%/28.7%
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 28.7% of 12690

12690/x=100/28.7
(12690/x)*x=(100/28.7)*x       - we multiply both sides of the equation by x
12690=3.4843205574913*x       - we divide both sides of the equation by (3.4843205574913) to get x
12690/3.4843205574913=x
3642.03=x
x=3642.03

now we have:
28.7% of 12690=3642.03