A store marks down the price of a necklace from $389.85 to $314.15. By what percent did the price decrease? Round to two decimal places.

First find the amount of the decrease: $389.85 − $314.15 = $75.70. Divide the decrease by the original price and multiply by 100: ($75.70 ÷ $389.85) × 100 ≈ 19.42%. The price decreased by 19.42%, choice C.

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