Alyosha shorted 416 shares at $22. The initial margin requirement was 61%. Alyosha's HPR was 16%. Calculate the percentage change in stock price. Express your answer as a decimal with four digits after the decimal point (e.g., 0.1234, not 12.34%).

Pauline sold short 101 shares at $47, but price has increased to $55, and the equity in her account is now only $2,663. Calculate Pauline's initial margin percentage. Express your answer as a decimal with four digits after the decimal point (e.g., 0.1234, not 12.34%).