Answer :
3/7 + 1/4 = 12/28 + 7/28 = 19/28
7/10 - 1/6 = 21/30 - 5/30 = 16/30 reduces to 8/15
3/5 * 5/2 = 15/10 reduces to 3/2 or 1 1/2
(1/8) / (7/4) = 1/8 * 4/7 = 4/56 reduces to 1/14
7/10 - 1/6 = 21/30 - 5/30 = 16/30 reduces to 8/15
3/5 * 5/2 = 15/10 reduces to 3/2 or 1 1/2
(1/8) / (7/4) = 1/8 * 4/7 = 4/56 reduces to 1/14