IIRC Prem controls the voting of 1,548,000 multiple voting shares but he has an economic interest in only 1/2 of those, i.e., 774,000. So he had economic interest in a total of 1,569,000 FFH shares (multiple voting+subordinated) prior to the sale of 275,000. So he sold 17.5% of his economic interest in FFH, a reasonably significant portion.