The ratio of red marbles to blue marbles is 2:5. If there are 20 blue marbles how many red marbles are there?

Answer 1

Hi Caitlynn S

You can cross multiply to solve for the red marbles

Let x = the number of red marbles

2/5 = x/20

Cross multiply

2(20)/5 = x

x = 8

I hope you find this useful

Answer 2

red / blue = 2 / 5

red = (2 / 5) * blue = (2 / 5) * 20 = 8