Respuesta :
Answer:
6 3/4 hours
Step-by-step explanation:
12 1/2 turned into an improper fraction is 25/2. 5 3/4 turned to an improper fraction is 23/4. The common denominator for these fractions is 4. So you have 50/4 -23/4 which is 27/4. The proper fraction form would be 6 3/4.