(1 + 11/2 2/5) / (2/5 1/3 2/3)
= (1 + 5.5 0.4) / (0.4 0.333 0.666)
= (1 + 2.2) / (0.088)
= 3.2 / 0.088
= 36.3636

3/2 7/5 13/11 4/6 10/14 * 22/26
= 0.38

53/8 4 1/6 - 15 3/8
= (53/8) (25/6) - (123/8)
= (5325)/(86) - 123/8
= 1325/48 - 123/8
= (1325 - 576) / 48
= 749/48
= 15 29/48