Answer:
710%
Explanation:
Find each unit price.
16.20 $/bucket × (1 bucket / 450 eggs) = 0.036 $/egg
3.50 $/dozen × (1 dozen / 12 eggs) = 0.292 $/egg
The percent markup is:
(0.292 − 0.036) / 0.036 × 100% ≈ 710%
The store marks up the price by approximately 710%.