Nate is helping to redesign his basement. He is in charge of choosing and buying the paint. He wants a specific shade of green, so he is going to combine blue and yellow paint in the ratio of 1:3. If he needs 8 gallons of paint, how much yellow paint does he need to buy?

Answer 1

The ratio of blue to yellow paint is 1:3, which means for every 1 gallon of blue paint, there are 3 gallons of yellow paint.

Since the total ratio is 1:3, there is a total of 1 + 3 = <<1+3=4>>4 parts.

To find out how much yellow paint Nate needs, divide the total amount of paint needed by the number of parts: 8 gallons / 4 parts = <<8/4=2>>2 gallons of yellow paint. Answer: \boxed{2}.