Janet uses 8.1 pints of white paint and blue paint to paint her bedroom walls.

Question

3/5 of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use to paint her bedroom walls?

Answer 1

w + b = 8.1, where w is white paint, and b is blue paint

3/5 of 8.1 is white
.6(8.1) is white
4.86 is white, so 3.24 is blue

or

if 3/5 is white, then 2/5 is blue
(2/5)(8.1) = .4(8.2) = 3.24