How many cups does twenty teaspoons equal?

48 teaspoons = 1 cup

1/48 = x/20 ... 1 cup to 48 teaspoons = x cups to 20 teaspoons

cross multiply

(48) (x) = (20) (1)

48x = 20 ... divide both sides by 48

x = 20/48 reduces to 5/12

so 5/12 cups = 20 teaspoons