A cookie recipe calls for 2/3 of a cup of flour and makes 2 dozen cookies. If you plan to make 8 dozen cookies, how many cups of flour do you need?

2/3 cup flour makes 2 dozen cookies

since you want to make 8 dozen (hopefully not all for yourself!) then how many 2 dozens fit into 8 dozens? 4 dozens

so since you multiply 2 by 4 to get 8, you will also multiply 2/3 by 4

2/3 * 4/1 = 8/3

you'll need 8/3 cups of flour. good luck on that cookie baking, make sure you dont burn anything!