Question

Joy started with 2.75 gallons of milk. She used 1.5 pints to make mashed potatoes and another cup to make cookies. How much milk does joy have left?

Answer 1

Amount of cups Joy has=2.75
1 cup=0.0625 gallons
1 pint=0.125 gallons
amount used to make mashed potatoes:
1.5×0.125=0.1875 gallons
amount used to make cookies=0.0625 gallons
total amount of milk used:
0.0625+0.1875=0.25

Remaining amount
=2.75-0.25=2.5 gallons

Answer 2

Unit conversions:
1 pint = 0.125 gallons
1 cup = 0.0625 gallons

Now,
Total volume of milk = 2.75 gallons
Milk used for mashed potato = 1.5 pints = 1.5*0.125 = 0.1875 gallons
Milk used for cookies = 1 cup = 1*0.0625 = 0.0625 gallons

Milk left = 2.75 - 0.1875 - 0.0625 = 2.5 gallons