11/20 − 3/25 = 215/500 which reduces to 43/100
5/8 - 7/20 = 25/40 - 14/40 = 11/40
21/25 − 2/5 = 11/25
20 over 13
6/11 - 1/6 is 25/66
11/12 - 2/9 = 25/36
17/25 − 3/20 = 265/500. This simplfies further to 53/100
25 - (20%) = 20
-3/20 - 5/4 = -3/20 - 25/20 = -28/20 = -7/5
-11 - 8 - 6 = -25
11
45
11/20 - 2/15 = 11x3/20x3 - 2x4/15x4 = 33/60 - 8/60 = (33 - 8)/60 = 25/60 = 25÷5/60÷5 = 5/12