Mike's effective simple annual interest rate is 18.8 X %. (Round your answer to two decimal places.) 1-/1 Points) DETAILS MY NOTES ASK YOUR TEACHER Jill purchased 240 shares of stock priced at $15.00 per share. To complete the purchase she was required to pay a transaction/commission fee of $136. Jill held the stock for 7 months, at which point she sold the stock at a price of $21.00 per share. To complete the sale of the stock, Jill was required to pay a transaction/commission fee of $153. What was the effective simple annual interest rate earned by Jill on her investment? Jill's effective simple annual interest rate earned on her investment is places.) %. (Round your answer to two decimal Submit Answer (-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER Ben purchased 270 shares of stock priced at $28.00 per share. To complete the purchase he was required to pay a transaction/commission fee of $122. Ben held the stock for 12 months, at which point he sold the stock at a price of $40.00 per share. To complete the sale of the stock, Ben was required to pay a transaction/commission fee of $203. What was the effective simple annual interest rate earned by Ben on his investment? Ben earned an effective simple annual Interest rate of decimal places.) % on his investment. (Round your answer to two