To make purple paint, Mya mixed 2/5 cup of red paint with 5/8 cup of blue paint. She wants to make a larger batch of the purple paint. How much red paint is needed to mix one cup of blue paint?

Why doesn't she just use the same amount of red and blue paint to make that same amount as before and just paint something else with the extra paint, and you can never be too cautious with running out of paint.

All you have to do is Dubble the equation