Cook a recipe for 9 dozen cookies. (Ratio and Proportion)

The recipe below will allow 3 dozen cookies to be cooked:
1 egg 1/2 cup brown sugar
1 cup flour 1/2 cup sugar
1/2 tsp salt 1/2 tsp. vanilla
1/2 cup butter 1 cup of chocolate chips

see the post below

To cook a recipe for 9 dozen cookies, you will need to scale up the ingredients from the original recipe, which yields 3 dozen cookies. Below is a scaled-up version of the recipe:

Ingredients:
- 3 eggs
- 1 and 1/2 cups brown sugar
- 3 cups flour
- 1 and 1/2 cups sugar
- 1 and 1/2 tsp salt
- 1 and 1/2 tsp vanilla
- 1 and 1/2 cups butter
- 3 cups chocolate chips

Explanation:
Since the original recipe yields 3 dozen cookies and you want to make 9 dozen, you need to multiply each ingredient quantity by 3.

For example, to determine the amount of eggs needed:
Original recipe = 1 egg for 3 dozen cookies
Scaled-up recipe = (1 egg) x (3) = 3 eggs

Similarly, you can calculate the quantities for the other ingredients:

- Brown sugar: 1/2 cup for 3 dozen cookies
Scaled-up recipe: (1/2 cup) x (3) = 1 and 1/2 cups

- Flour: 1 cup for 3 dozen cookies
Scaled-up recipe: (1 cup) x (3) = 3 cups

- Sugar: 1/2 cup for 3 dozen cookies
Scaled-up recipe: (1/2 cup) x (3) = 1 and 1/2 cups

- Salt: 1/2 tsp for 3 dozen cookies
Scaled-up recipe: (1/2 tsp) x (3) = 1 and 1/2 tsp

- Vanilla: 1/2 tsp for 3 dozen cookies
Scaled-up recipe: (1/2 tsp) x (3) = 1 and 1/2 tsp

- Butter: 1/2 cup for 3 dozen cookies
Scaled-up recipe: (1/2 cup) x (3) = 1 and 1/2 cups

- Chocolate chips: 1 cup for 3 dozen cookies
Scaled-up recipe: (1 cup) x (3) = 3 cups

By following this scaled-up recipe, you will have enough ingredients to cook 9 dozen cookies.