Duval went to bat 80 times during baseball season. In the first season he had 15 hits. In the second half he had 9 hits. Which percent of the time did Duval get a hit during the entire season?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?