20 fluid ounces is equal to 2.5 cups.
To convert fluid ounces to cups, you need to know that 1 cup is equivalent to 8 fluid ounces.
So, to convert 20 fluid ounces to cups:
20 fl oz รท 8 fl oz/cup = 2.5 cups
Therefore, 20 fluid ounces is equal to 2.5 cups.