In a recipe for tomato sauce,the ratio of fluid ounces of water to fluid ounces of tomato paste is 3:4.you plan to make 35 fluid ounces of tomato sauce.How many fluid ounces of tomato paste do you need?
water : paste = 3 : 4 = 3x : 4x
3x + 4x = 35
x = 5
so you need 15 ounces of water and 20 ounces of paste
3+4 = 7
35/7 = 5
3:4 = 15:20