21/30 = 0.7
630/30 = 21/1 = 21
No, that's 7/10
21/30 - 8/30 = 13/30
0.7
21 over 30
75/30 = 21/2
30/63 = 10/21
30/42 = 15/21 = 5/7
21/30 - 5/30 = 16/30 = 8/15
30/42 = 15/21 = 5/7
7/10 - 1/6 = 21/30 - 5/30 = 16/30 = 8/15.7/10 - 1/6 = 21/30 - 5/30 = 16/30 = 8/15.7/10 - 1/6 = 21/30 - 5/30 = 16/30 = 8/15.7/10 - 1/6 = 21/30 - 5/30 = 16/30 = 8/15.