You know the following information about stock CLB in 2012. Closing price on 6/30/2010: $147.61 There was a 2:1 split 7/9/2010 and $0.71 dividends per share were paid on 7/21/2010. The closing price on 7/30/2010 was 77.25. What was the rate of return for CLB for the month of July 2010? (Provide your answer in % with two digits after the decimal point and include a % sign in your answer.)