Final answer:
To find the number of pizzas left over, add the fractions and then simplify to get the final answer of 11 and 1/3 pizzas.
Step-by-step explanation:
To find the number of pizzas left over, we need to add the fractions together.
The fractions are 23/6 and 45/6. To add fractions with the same denominator, we simply add the numerators together and keep the denominator the same.
In this case, 23/6 + 45/6 = 68/6.
To simplify this fraction, we divide both the numerator and denominator by their greatest common divisor, which is 2. 68 divided by 6 is 11 with a remainder of 2.
Therefore, the simplified fraction is 11 and 2/6, which is the same as 11 and 1/3. So, there were 11 and 1/3 pizzas left over after Freddy's party.