Final answer:
To find the total cheese needed for 3 pizzas, multiply the cheese required for one pizza (2/5 pound) by the number of pizzas (3), resulting in 6/5 pounds, or 1(1/5) pounds, of cheese in total.
Step-by-step explanation:
The question asks how many pounds of cheese are needed to make 3 pizzas, if each pizza requires (2/5) pound of cheese. To find the total amount of cheese needed, we multiply the amount of cheese needed per pizza by the number of pizzas. This can be expressed as:
Amount of cheese per pizza (in pounds) × Number of pizzas = Total amount of cheese needed (in pounds)
So, we calculate:
(2/5) × 3 = 6/5
The fraction 6/5 is already in simplest form, which means Serenity will need 6/5 pounds of cheese, or 1(1/5) pounds, to make 3 pizzas for the pizza party.