Given:
top x shareholders in a corporation each own y shares of a certain stock
corporation's ownership is represented by a total of w shares of stock.
x - represents the number of top shareholders in a corporation
y - represents the number of shares of a certain stock
w - represents the total shares owned by the corporation
x*y OR xy - total shares owned by the shareholders.
The percent of the corporation owned by the top x shareholders is:
xy/w