not sure what is wrong with my standard deviation?

Bu Consider the following information: 88808 C Rate of Return if State Occurs Probability of State State of Economy of Economy Stock A Stock B Stock C Boom 25 37 47 27 Good 50 21 .18 12 Poor 20 -05 -08 - 05 Bust 05 -15 33 - 10 Your portfolio is invested 25 percent each in A and C, and 50 percent in B. What is the expected return of the portfolio? (Do not round Intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b-1. What is the variance of this portfolio? (Do not round Intermediate calculations and round your answer to 5 decimal places, e... 16161.) b-2. What is the standard deviation? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) Answer is complete but not entirely correct. a. Expected return 16 06 b.1. Variance 0.03150 b-2. Standard deviation 0.18 %