At the opening of a trading day at a certain stock exchange, the price per share of stock K was $8. If the price per share of stock K was $9 at the closing of the day, what was the percent increase in the price per share of stock K for that day?  Answers:
A) 1.4%	B) 5.9%	C) 11.1%	D) 12.5%	E) 23.6%
Opening = 8   Closing = 9   Rise in price = 1   So, percent increase = 18∗10018∗100 =&gt;12.50%   Thus answer will be (12.5%)
<result>D</result>
At the opening of a trading day at a certain stock exchange, the price per share of stock K was $8. If the price per share of stock K was $9 at the closing of the day, what was the percent increase in the price per share of stock K for that day?