A coin that was featured in a famous novel sold at auction in 2014 for $4,120,500. The coin had a face value of $20 when it was issued in 1786 and had previously been sold for $395,000 in 1968.

At what annual rate did the coin appreciate from its first minting to the 1968 sale? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Rate of return

%

What annual rate did the 1968 buyer earn on his purchase? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Rate of return

%

At what annual rate did the coin appreciate from its first minting to the 2014 sale? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Rate of return

%