The price of a book is increased from $300 to $420. What is the % of increase in its price? Choose the correct answer:
A) 10%	B) 20%	C) 40%	D) 50%	E) 60%
Explanation: Change in the price = Rs 420 â€“ Rs 300   = Rs 120   Percentage of increase = Change in the price Initial Price   * 100.   Percentage increase in price =( 120 300   ) *100 = 40%   40%
<result>C</result>
The price of a book is increased from $300 to $420. What is the % of increase in its price?