1st pan of bread = cut in halves = 1/2 ( 2 halves)
2nd pan of bread = cut in fourths = 1/4 ( 4 fourths)
To calculate how many did he cut, add both fractions:

Multiply the first fraction by 2/2, in order to have equal denominators:


Add the top numbers ( numerator ) and keep the same denominator:

3/4 pieces in all
To find which pieces are larger, simply divide:
1/2 = 0.5
1/4= 0.25
The halves are larger