Valentina made costume crowns for the king and the prince in her school play. She used 5 red gems and 8 purple gems for the king's crown. The prince's crown was smaller, so Valentina only used 4 red gems and 5 purple gems for that one. Which crown had a greater ratio of red gems to purple gems?

A. The king's crown had the greater ratio.
B. The price's corwn had the greater ratio
C. Neither. The crowns had the same ratio.

1 answer

To determine which crown had a greater ratio of red gems to purple gems, we need to calculate the ratio for both crowns.

King's Crown:

  • Red gems = 5
  • Purple gems = 8

The ratio of red to purple gems for the king's crown is: \[ \text{Ratio for King's Crown} = \frac{5 \text{ red gems}}{8 \text{ purple gems}} = \frac{5}{8} \]

Prince's Crown:

  • Red gems = 4
  • Purple gems = 5

The ratio of red to purple gems for the prince's crown is: \[ \text{Ratio for Prince's Crown} = \frac{4 \text{ red gems}}{5 \text{ purple gems}} = \frac{4}{5} \]

Now, let's compare the two ratios:

  • King's Crown: \( \frac{5}{8} \)
  • Prince's Crown: \( \frac{4}{5} \)

To compare these ratios, we can convert them to a common denominator or compare their decimal values:

  • \( \frac{5}{8} = 0.625 \)
  • \( \frac{4}{5} = 0.8 \)

Since \( 0.8 > 0.625 \), the prince's crown has the greater ratio of red gems to purple gems.

Therefore, the answer is: B. The prince's crown had the greater ratio.