30 pizzas were ordered for a middle school mixer. 18 of them were topped with pepperoni and/ or sausage. While the remaining ones had only cheese to accommodate vegetarians. What percent of pizzas were kept vegetarian?

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.

is the anwser b. (-13)?