Answer:
Answer to the first one : 1/4
Answer to the second one : 11/6
Answer to the third question : 87/40
Answer to the fourth question : 2/11
Answer to the fifth question : 77/54
Answer to the sixth question : 3/8
Answer to the seventh question : 41/2
Answer to the eighth question : 5
Answer to the ninth question : 17/3
Answer to the tenth question : 27/4
Answer to the eleventh question : 1/36
Answer to the twelfth question : 160/27
Answer to the thirteenth question : 1/15
Answer to the fourteenth question : 26/63
Answer to the fifteenth question : 1/5
Answer to the sixteenth question : 33/5
Answer to the seventeenth question : 9/20
Answer to the eighteenth question : 1/6