Question

In art class students are mixing black and white paint to make gray paint. Grace mixes 2 cups of black paint and 1 cup of white paint. Chase mixes 7 cups of black paint and 3 cups of white paint. Use Grace and Chase’s percent of white paint to determine whose gray paint will be lighter.

Answer 1

Grace

2 cups black paint + 1 cup white paint

percent of white paint = (cups white paint / total cups of paint) × 100 = (1/3)×100 = 33.3%

Chase

7 cups black paint + 3 cups white paint

percent of white paint = (cups white paint / total cups of paint) × 100 = (3/10)×100 = 30%

Grace's gray is lighter since it has a greater percentage of white paint