28/21 = 4/3 = 1 1/3
1 over 7 minus 28 over 28 = -168/196 which reduces to -6/7
28 over 2 is 14.
-28/28 = -1.000
10 over 28 simplifies to 5 over 14.
1/7 + 1/2 + 5/28 = 4/28 + 14/28 + 5/28 = 23/28
41/7 - 25/28 = 164/28 - 25/28 = 139/28 = 427/28
20/28 + 21/28 = 41/28 or 1 and 13/28
a/7 + a/4 = 4a/28 + 7a/28 = 11a/28
28 over 16 would be: 28/16 = 7/4
63/28 - 4/28 = 59/28
It is 28 over 1, which is just 28.
6/14 - 3/4 = 12/28 - 21/28 = - 9/28 = (negative 9 over 28).