Question

Rodney bought a 25-pound bag of dog food.His dog at 10 2/5 pounds of food in the first month and 10 4/5 pounds of the food in the second month.How much dog food,in pounds, was remaining in the bag at the end of the two months

Answer 1

10 4/5+ 10 2/5= 20 1/5 
25- 20 1/5 = 4 4/5 pounds of dog food is left.

Answer 2

Add the two together 10 2/5 + 10 4/5 =21 1/5 
Take 25 and subtract it by 21 1/5 you would get 3 4/5 
which would be 3.8 pounds