you used 5 cups of flour to bake 80 cookies how many cups you need if you are planning to bake 14 cookies

You need to set up a proportion,

5 cups / 80 cookies = x cups / 14 cookies

X because that's what we're trying to find.

Cross multiply and you get

(5) (14) = 80x

70=80x

Divide and get x by itself

.875 or, 7/8 cups of flour.