All-Stores, Inc., is a holding company that has voting control over both General Stores and Star Stores. All-Stores owns General Stores and Star Stores common stock valued at $15,000 and $12,000, respectively. General's balance sheet lists $130,000 of total assets; Star has total assets of $110,000. All-Stores has total common stock equity of $20,000.

a. What percentage of the total assets controlled by All-Stores does its common stock equity represent?

b. If a stockholder holds $5,000 worth of All-Stores common stock equity, and this amount gives this stockholder voting control, what percentage of the total assets controlled does this stockholder's equity investment represent?