Question

Joe’s apple weigh 4/5 lb. Marta’s apple weigh 0.5 lb. How much more does joe’s apple weigh than Marta

Answer 1

Joes apple weighs .3 more than martas. 

Answer 2

convert Joe's apple to decimal by dividing 4 by 5: 4 / 5 = 0.8 pounds

now subtract to find the difference:
0.8 - 0.5 = 0.3

Joe's apple weighs 0.3 pounds more