PAINTYou mix 2/5 cup of red paint for every 1/4 cup of blue paint to make 1 5/8 gallons of purple paint.
a. How much red paint and blue paint do you use?
First 1 gallon = 16 cups
1 5/8 gall = 26 cups
r 1/4 /(2/5+1/4) * 26 = 10 cups red
16 cups blue