1) 1 3/4 =7/4=21/12, 3 5/12 = 41/12;
2) 4 2/7 =30/7=90/21, 5 4/21=109/21;
3) 1 7/20=27/20=135/100, 2 3/50=103/50=206/100.
1) 1 3/4 =7/4=21/12, 3 5/12 = 41/12;
2) 4 2/7 =30/7=90/21, 5 4/21=109/21;
3) 1 7/20=27/20=135/100, 2 3/50=103/50=206/100.