1:1/7 5:5/8 4:8/9 120:1/20 3/7:9/14 3/10:8/14 7/12:5/6 7/8:3/4 12:5/8 1/3:3 5/7:10 10/11:5 1/200:200 9/16 :6 84/121:63/110

1)  1 : 1/7 = 7;

2)  5 : 5/8  = 8;

3)  4 : 8/9 = 4 1/2; 

4)  120 : 1/20 = 6;

5)  3/7 : 9/14 = 2/3;

6)  3/10:8/14 =21 /40;

7)  7/ 12 : 5/6 = 7/10;

8)  7/8 : 3/4 = 1 1/6;

9)  12:5/8 = 19 1/5;

10)  1/3:3 = 1/9;

11)  5/7:10 = 1/14;

12)  10/11:5 = 2/11;

13)  1/200:200 = 1/40000;

14)  9/16 :6 = 3/32;

15)  84/121:63/110 = 1 7/33.