To get a certain shade of green plant. Melissa decides to mix 3 gallons of blue paint with 2 gallons of yellow paint. How much blue paint does Melissa need for each gallon of yellow paint?

Well seeing as the ratio is 3 gallons of blue paint to every 2 gallons of yellow paint, for every one gallon of yellow paint she would need 1.5 gallons of blue paint.

Also 3 divided by 2 is 1.5 but either way is fine I think