In a recipe, the ratio of fluid ounces of water to fluid ounces of tomato paste is 3: 4. you plan to make 35 fluid ounces of sauce. how many fluid ounces of tomato paste do you need?

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint