The Brewing Company is considering a capital project with a one-year life and the following possible rates of returns which are dependent on the state of the economy. The estimated rates of return are shown in the table:

Given these probabilities and possible rates of return, the standard deviation of returns on the capital project is _____%. (Fill in the blank with your calculation result of two decimal places).

State of the Economy Probability of Each State Occurring Rates of Return if State Occurs

Boom .40 24%

Normal .40 10%

Recession .20 -12%