Question

pls give me the answer and solutions of this question

Answer 1

6/7 = 36/42= 30/35= 66/77
18/72= 90/360=36/144=180/720

Answer 2

a) 6/7=36/42=30/35=66/77
b) 18/72=90/360=36/144=180/720

they are all multiples.
see to the given clue like numerator and denominator.
if numerator is multiple of 6 in(a) then its 36 and denominator would be 7x6=42

hope this is helpful 
have a nice day.