Wynona buys some new boots that are priced $85.79. She gets successive discounts of 10% followed by 5% off on the boots. The purchase price of Wynona’s boots is _____ of the original price.

After the 10% discount, Wynona pays 90% of the original price. The additional 5% discount means she pays 95% of that amount: 0.90 × 0.95 = 0.855, or 85.5% of the original price. So the purchase price is 85.5% of the original price.

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