A book originally cost $80. During a sale, the price was reduced by 20%. After the sale ended, the new price was then INCREASED by 10% of the sale price. Find the final price of the book.
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Worked Solution
Step 1: Apply the 20% reduction to the original price.
Sale price = $80 × (100% − 20%) = $80 × 0.80 = $64.
Step 2: Find 10% of the SALE price (not the original).
Increase = $64 × 10% = $6.40.
Step 3: Add the increase to the sale price.
Final price = $64 + $6.40 = $70.40.
Answer: $70.40
Correct answer: $70.40
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