Tatenda has a chocolate chip cookie recipe that uses 2 cups of sugar for 5 dozen cookies. how much sugar will he need if he only wants to make 40 cookies

1 1/3 CUP 

You would put
2 cups   times x
           
60 cookies.      40 cookies
 
You would need to cross multiply then divide.
so 2 times 40 divided by 60

you would need to make 5 dozens into the amount of cookies

5dozen = 60cookies.
to downsize the recipe we divide the amount we want to make by the recipe
40/60 and then multiply by the amount in the recipe 2cups.
your answer is 1 1/3cups of sugar