Question

If Sammy eats 6/7 of a pizza in 2/21 of an hour, how many pizzas will he eat in one hour?

Answer 1

9 pizzas

Explanation:

We can use ratios to solve

6/7 x pizza

------------ = ------------

2/21 hour 1 hour

Using cross products

6/7 *1 = 2/21 x

Multiply each side by 21/2

6/7 * 21/2 = x

Rewriting

6/2 * 21/7 =x

3 *3 =x

9

9 pizzas