(- 5 1/5) : (- 2 2/25) = (- 26/5) : (- 52/25) = (- 26/5) * (- 25/52) = (- 1/1) * (- 5/2) = 5/2
16 1/4 - (3 1/4 + 5 7/27) = 16 1/4 - (3 27/108 + 5 28/108) = 16 1/4 - 8 55/108 = 16 27/108 - 8 55/108 = 15 135/108 - 8 55/108 = 7 80/108 = 7 20/27
7 2/11 - (4 5/7 - 8 9/11) = 7 2/11 - (33/7 - 97/11) = 7 2/11 - (363/77 - 679/77) = 7 2/11 - (- 316/77) = 79/11 + 316/77 = 553/77 + 316/77 = 869/77 = 11 22/77 = 11 2/7
3/20 * (- 2/35) * (- 6 2/3) * 17 1/2 = 3/10 * (- 1/35) * (- 20/3) * 35/2 = - 3/350 * (- 20/3) * 35/2 = 4/70 * 35/2 = 2/2 * 1/1 = 1
8 3/19 - (1 1/9 + 5 3/19) = 8 3/19 - (1 19/171 + 5 27/171) = 8 3/19 - 6 46/171 = 8 27/171 - 6 46/171 = 7 198/171 - 6 46/171 = 1 152/171 = 1 8/9
(5 3/7 + 7 3/16) - 6 5/16 = (5 48/112 + 7 21/112) - 6 5/16 = 12 69/112 - 6 5/16 = 12 69/112 - 6 35/112 = 6 34/112 = 6 17/56