15/17:3 16/17:3 21/23:7 20/23:7

Question

15/17:3 16/17:3 21/23:7 20/23:7

Answer 1

1)15/17:3=15/17×1/3=5/17×1/1=5/17; 2)16/17:3=16/17×1/3=16/51; 3)21/23:7=21/23×1/7=3/23×1/1=3/23; 4)20/23:7=20/23×1/7=20/161.