Question

1/2,3/6 And 9/18 What two patterns comes next

Answer 1

it is increasing scale factor of 3

9/18 *3 = 27/54

27/54 * 3 = 81/162

Answer 2

1        3         9
-         -          -  
2        6         18
As you can tell, the top and bottom are being multplied by 3, so continue to multiply it by three
27/54 and 81/162