how would i figure this out?

Passmore Propane has 15,000 shares of common stock outstanding with a current price of $34 per share. It has 6,000 shares of preferred stock outstanding that sells at $20 per share. Passmore also has bonds outstanding with a total face value of $300,000 that sell at 108 percent of par. What weight should be placed on the preferred stock when estimating Passmore's weighted average cost of capital (WACC)? Answer Format: Positive percentage rounded to 2 decimal places