Answer:
first box is 4 and the last fraction is 3/8
Explanation:
1 half is equivalent to 4 eighths (4 is half of 8, 8 parts equals 1).
for the 2nd set of boxes 2 fractions with the same denominator can have their numerator subtracted (I'm not very good at explaining methods I hope that made sense)
since we know 1/2 is equal to 4/8, 4/8-1/8 is 3/8