Hi there!
For number 1 it shows that the last two blanks would be 8/8 and 4/4 since adding 1/8 would be 8/8 and adding 1/4 would be 4/4.
For number 2, it would be 3/6 or a half. It wants to have another equivalent to 3/6 and with dividing 3 for each side, it would be 1/2.