I have a 4/16 of a gallon of red paint and add 6/8 of a gallon of blue paint to make purple paint how much purple paint do you have

you would have 1 gallons of purple paint if you were to mix all of both red and blue paint together

Step-by-step explanation:

step 1 times 6/8 by two so you will have a common denomanator

then you get 12/16

after you have done this you would add 12/16 and 4/16 and you end up with 1