Green paint is made by mixing yellow and blue paint. Given that, every 4 gallons of green paint contains 3 gallons of blue paint, how many gallons of yellow paint is in 4 gallons of green paint? Green-blue=yellow 4-3=1 Therefore 1 gallon of yellow paint is in 4 gallons of paint. The ratio of blue to yellow is 3:1 If there are 16 gallons of green paint, how many gallons blue and yellow are in it? blue= 3 in 4 green If 16=4 =3 3/4*16=12 Therefore there are 12 gallons of blue paint in 16 gallons of green paint. Yellow=1 in 4 gallons If16=4 =1 1/4*16=4 Therefore there are 4 gallons of yellow paint in 16 gallons of green paint. I am not so sure about this but I hope it helps.Sorry if it doesn't