Question

1. nyoko is having a pizza party. two large pizzas serve 9 people. how many large pizzas should she order to serve 36 guests at the party? (example 1)

Explanation:

Step1: Find out how many people one pizza serves

Since 2 large pizzas serve 9 people, one large pizza serves $\frac{9}{2}$ people.

Step2: Calculate number of pizzas needed

Let $x$ be the number of large pizzas needed to serve 36 guests. We set up the proportion $\frac{9}{2}=\frac{36}{x}$. Cross - multiply gives $9x = 36\times2$. Then $9x=72$, and $x=\frac{72}{9}=8$.

Answer:

8