Taggart Transcontinental has a value of $500 million if it continues to operate, but has outstanding debt of $600 million. If Taggart declares bankruptcy, bankruptcy costs will equal $50 million, and the remaining $450 million will go to creditors. Instead of declaring bankruptcy, Taggart proposes to exchange the firm's debt for a fraction of its equity in a workout. The minimum fraction of the firm's equity that Taggart would need to offer to its creditors for the workout to be successful is closest to:

50%

75%

83%

90%