Paul's Pizzeria sells 45 cheese pizzas and 20 pepperoni pizzas each week. What is the ratio of cheese pizzas to pepperoni pizzas sold each week by Paul's Pizzeria? \( 9: 4 \) \( 9: 2 \) \( 3: 1 \) \( 4: 2 \)

To find the ratio of cheese pizzas to pepperoni pizzas, we compare the number of cheese pizzas (45) to the number of pepperoni pizzas (20). We simplify this by dividing both numbers by their greatest common divisor, which is 5 in this case. Thus, \( 45 \div 5 = 9 \) and \( 20 \div 5 = 4 \), giving us the simplified ratio of \( 9:4 \). So, the correct answer is \( 9:4 \). Enjoy your slice of pizza knowledge!