Final answer:
You can fill 25 packages of water balloons with 5 gallons of water, by dividing the total gallons by the amount needed per package.
Step-by-step explanation:
To calculate how many packages of water balloons can be filled with 5 gallons of water, when it takes 1/5 of a gallon to fill each package, you divide the total amount of water by the amount needed for one package.
Determine the volume of water required for one package: 1/5 gallon.
Divide the total gallons of water by the volume needed for one package: 5 gallons ÷ 1/5 gallon per package.
Calculate: 5 gallons ÷ 1/5 gallon = 5 × 5 = 25 packages.
Therefore, you can fill 25 packages of water balloons with 5 gallons of water.