If each person paid an equal amount, who would save the most money? explain your reasoning using at least two complete sentences. my numbers are 8.58,9.59,14.34,15.54

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