Jake and 4 friends each ate three-quarters of a pizza, how many pizzas did they consume all together? a) 15/4 b) 19/5 c) 4/15 d) 7/2

A) 15/4

Step-by-step explanation:

The problem states that Jake and his 4 friends were eating pizza, this would be a total of 5 people, including Jake.  So, when you calculate the amount of pizza eaten, you will need to multiply by 5 people.  Since each person ate three-quarters (3/4) of a pizza, you need to multiply:

When we multiply a whole number by a fraction, we place it over a denominator of 1.  When multiplying fractions, we multiply the numerators together and the denominators together.  So, the final answer is 15/4.