3/14
1.75 or 1 and 3/4
4/21 or 4 over 21 because 1x4 is 4 and 7x3 is 21
18/7 * 9/12 = 18/7 * 3/4 = (18*3)/(7/4) = 54/28 = 27/14
10
4/49
8/3 x 2/7 is 16/21
1 3/4 is 7/4 and 4 is 4/1. 7/4 x 4/1 is 28/4 or 7.
21 over 72, or 7 over 24 (simplified)
It is 2.1 or 21 over 10
63/16
7/12 × 6/14 = 1/4