There are 8 yellow and 24 blue. Our ratio from yellow to blue is 8:24. To simplify this, we need to see if we can divide 8 and 24 by a common factor. 8 and 24 can be divided by 8, so let's do that. 8/8 = 1. 24/8 = 3. Your new and simplified ratio is 1:3 from yellow to blue, but we're looking for blue to yellow. Flip the ratio. 3:1 is your ratio. C.) is your correct answer. I hope this helps!