A book regularly sells for $28. If the book is on sale for "20% off", how much is the sales price of the book?
$22.40
$5.60
$25.20
$21.20
Detailed Explanation
20% of 28 = 28 ×0.2 = 5.60. The sales price is then 28 - 5.6 = 22.40
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