Answer: 10%
First off, you need to divide 1200 with 1080.
1200 - 1080 = 120.
Next, divide 120 with the original number.
120 / 1200 = 0.1
Then, multiply 0.1 with 100.
100 x 0.1 = 10
Finally, add a % at the end.
10 -> 10%
So in summary, your answer is 10%