Mason gave the waiter a $14.58 tip, which was 15 percent of the dinner bill. What was the amount of the dinner bill before he added the tip?

The $14.58 tip is 15% of the dinner bill, so divide the tip by 0.15 to find the full bill: $14.58 ÷ 0.15 = $97.20. The dinner bill before the tip was $97.20, choice C.

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