-7/-8 x -20/-21 = 5/6
5/21 * 7/20 = 5/3 * 1/20 = 1/3 * 1/4 = 1/12
21/60 = 7/20
1/5 x 5/7 x 7/8 = 35/280 = 1/8
(20/21)/(2/3) = (20/21) x (3/2) = 10/7 = 1 and 3/7 = 1.428571429
21/60 = 7/20
7/24 * 6/21 = 1/12
They are: 7/20 = 14/40 = 21/60
2/7 +2/3 = 6/21 + 14/21 = 20/21
7/20
7/20 + 3/9 = 7/20 + 1/3 = 21/60 + 20/60 = 41/60
7/20 is the same as 21/60 1/3 is the same as 20/60 therefore 7/20 is the greater
5/7 x 7/10 = 35/70 = 1/2 1/2 x 5/21 = 5/42