What is 27 + 7/-4, please show work.

27+(7/-4) =

First convert into fraction and simplify problem:

27/1 - 7/4 =

Next convert denominator into like terms (what you are doing here is multiplying 27/1 by 1, you then multiply the numerator by the numerator and denominator by denominator):

(27/1 * 4/4) - (7/4)

108/4 - 7/4 = 101/4 = 25 1/4