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Kennedy buys cell phone cases for $4.50 and sells them to her friends for $18.00. What is the percent mark-up? (HINT: use the percent of change method)
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Kennedy buys cell phone cases for $4.50 and sells them to her friends for $18.00. What is the percent mark-up?

(HINT: use the percent of change method)

User JWqvist
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4 votes
300% markup is the answer
User Macnique
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