For the first set,
30 - 14 = 16
16 ÷ 2 = 8
Similarly, for the second set,
Now, for the second set,
84 - 12 = 72
72 ÷ 2 = 36
In the same way, we need to follow the steps in the options:
In option 1,
108 - 18 = 90
90 ÷ 2 = 45
Thus, option 1 is correct.