Gramercy Option Price: .27 Blackrock Estimated Average share price: .75 Banro Stock Price: .175 From there you simply use the following equation to calculate your discount. Black Friday Discount on Shares based on Gramercy option price.... 1 - .17 / .27 = .37 or 37% Discount Black Friday Discount on Shares based on BlackRock common price.... 1 - .17 / .75 or .78 or 78% Discount Happy Share shopping!!