In 2017, Leonardo da Vinci's painting Salvator Mundi sold for a record $452.5 million. In 1958, it sold for $136, equivalent in purchasing power to about $1,170 at 2017 prices. The painting was originally commissioned by King Louis XII of France in about 1500. The Wall Street Journal guesstimated that the king may have paid Leonardo the equivalent in purchasing power of $300,000 in 1519. a. What was the annual rate of appreciation in the price of the painting between 1958 and 2017 adjusted for inflation? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.)