The music store is having a 15% off sale on all classical music cds. Lyell has a coupon for 20% off any classical music cd. How much will Lyell save on a classical music cd that has a price of $23.99?

The 15% sale reduces the $23.99 price to $23.99 × 0.85 = $20.3915. The 20% coupon then saves 20% of that reduced price: $20.3915 × 0.20 = $4.0783, and the sale already saved $23.99 × 0.15 = $3.5985. Together, Lyell saves about $7.68, choice $7.68.

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