28% = 28/100 = 7/25
28 is an integer which may be written as a fraction in the form 28/1 although I see no point in doing so.
-5.6 = -28/5
-5.6 can be written as -28/5.
1.12 = 1120/1000 = 28/25
28 as a fraction = 28/1
28% of 63. "of" is multiply, so 28% x 63. 28% can be written as either a fraction, 28/100, or a decimal, 0.28. Personally, I prefer a fraction. 28/100 x 63 = 1764/100 = 17.64
9 28 into a fraction = 9/28
It is simply 28/1 as an improper fraction
fraction of 42 is 28 = 28/42 or 2/3
The fraction 28/25 cannot be reduced any more. It can be written and 1 and 3/25ths.
28 is an integer, and there is no sensible way to represent it as a fraction.