To determine how much sugar is needed to make 24 cookies using this recipe, you will first need to find the amount of sugar needed per cookie.
In this case, the original recipe makes 18 cookies with 3/4 cup of sugar. To find the amount of sugar per cookie, divide 3/4 cup of sugar by 18 cookies:
3/4 cup / 18 cookies = 1/4 cup of sugar per cookie
Now that you know the amount of sugar per cookie, you can calculate the total amount of sugar needed for 24 cookies. Multiply the amount of sugar per cookie (1/4 cup) by the number of cookies (24):
1/4 cup per cookie * 24 cookies = 6 cups of sugar
Therefore, in order to make 24 cookies using this recipe, you would need 6 cups of sugar.