7th grade math studies

Question

If 4/5 cups of paint are mixed with 4 cups of blue paint to make purple paint. How many cups of blue paint are used for each cup of red paint?

Answer 1

b/4= 1/(4/5) = 5/4

5 cups of blue mixed with 1 cup red to get purple

4 cups blue mixed with 4/5 cup red to get the same shade of purple

5/1 = 4/(4/5) = 4(5/4) = 5