What is 78.9 percent of 9980 - 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 9980 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 9980 is 100%, so we can write it down as 9980=100%.
4. We know, that x is 78.9% of the output value, so we can write it down as x=78.9%.
5. Now we have two simple equations:
1) 9980=100%
2) x=78.9%
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:
9980/x=100%/78.9%
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 78.9% of 9980

9980/x=100/78.9
(9980/x)*x=(100/78.9)*x       - we multiply both sides of the equation by x
9980=1.2674271229404*x       - we divide both sides of the equation by (1.2674271229404) to get x
9980/1.2674271229404=x
7874.22=x
x=7874.22

now we have:
78.9% of 9980=7874.22