Luis rides his bicycle 34 mile in 15 minutes, or 14 hour, along the bike trail. Assuming he rides at a constant rate, what is his speed, in miles per hour?

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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