b) 2/3 * 7/11 = 14/33
-5/7 * (-4/9) = 20/63
32/55 * 5/8 = 4/11
7/36 * 12/49 = 1/21
c) 2 2/3 * 9/32 = 8/3 * 9/32= 3/4
1 2/5 * 1 1/14 = 7/5 * 15/14= 3/2= 1 1/2
2 1/7 * (-4 1/5) = 15/7 * (21/5)= - 9
-1 5/11 * (-1 2/20) = -16/11 * (- 22/20)= 8/5= 1 3/5
e) 2/7 : 6/7 = 2/7 * 7/6 = 1/3
-5/12 : (-5/16) = 5/12 * 16/5 = 4/3 = 1 1/3
32/45 : 24/25 = 32/45 * 25/24 = 4/9 * 5/3 = 20/27
-35/36 : 21/8 = -35/36 * 8/21 = -5/9 * 2/3 = -10/27
f) 2 2/3 : 4/15 = 8/3 * 15/4 = 2 * 5 = 10
-1 5/11 : (-20/22) = 16/11 * 22/20 = 4 * 2/5 = 8/5 = 1 3/5
1 2/5 : 2 1/10 = 7/5 : 21/10 = 7/5 * 10/21 = 2/3
2 1/7 : (-1 4/21) = -15/7 : 25/21 = -15/7 * 21/25 = -3 * 3/5 = -9/5 = -1 4/5
