Final answer:
To calculate the number of pepperoni pizzas made by the cafeteria, we need to find the difference between the total number of pizzas and the number of cheese pizzas.
Step-by-step explanation:
To find the number of pepperoni pizzas made by the cafeteria, we first need to calculate the number of cheese pizzas. We know that 70% of the total pizzas made were cheese pizzas. So, 70% of 120 pizzas is 0.7 * 120 = 84. Therefore, the cafeteria made 84 cheese pizzas.
To find the number of pepperoni pizzas, we subtract the number of cheese pizzas from the total number of pizzas made. So, 120 - 84 = 36. Therefore, the cafeteria made 36 pepperoni pizzas.