Chelsea made 16 gallons of soup this year
Solution:
Given that,
Last year, Chelsea made 64 one-cup servings of soup for a school party
We know that,
1 gallon = 16 cups
Therefore,
4 gallons = 64 cups
Thus last year she made 4 gallons of soup
This year she will make four times the amount of soup that she made last year.
Gallons of soup made this year = four times the amount of soup that she made last year
Gallons of soup made this year = 4 x 4 = 16
Thus Chelsea made 16 gallons of soup this year