how many green marbles does the bag contain?

Question

each marble bag sold by Deandre's Marble Company contains 4 blue marbles for every 7 green marbles. If a bag has 24 blue marbles, how many green marbles does it contain?

Answer 1

42 green marbles

7/4 = g/24

ratios are a constant green/blue

cross multiply

4g = 7(24)

divide by 4

g =7(6) = 42 green marbles