Last year, the price per transaction of certain company increases P percent from the year before, and the number of transactions increase N percent from the year before. Total revenue is simply the number of transactions times the price per transaction. Assume this one transaction is this company's only source of revenue. Which of the following is the percent increase in revenue last year, from the year before?	Choose the correct choice from the following answers:	A) P∗N %	B) (P+N)	C) (P+N+P∗N/100) %	D) (P+N-P∗N/100) %	E) (P+N+P∗N/100)^2 %
Assume   x = price per transaction for previous year   y = price per transaction for this year   Relationship between x and y   y =x (1+P/100)   Similarly, if   n1= no. of transactions for last year   n2 = no. of transactions for this year   n2 = n1(1+N/100)   Now, the question is [(n2y- n1x) /n1x] * 100   n2y = n1x(1+P/100)(1+N/100)   So, [(n2y - n1x)/n1x] * 100 = (n1x[(1+P/100) (1+N/100) - 1]/ n1x) * 100   (P+N-P∗N/100) % is the answer.
<result>D</result>
Last year, the price per transaction of certain company increases P percent from the year before, and the number of transactions increase N percent from the year before. Total revenue is simply the number of transactions times the price per transaction. Assume this one transaction is this company's only source of revenue. Which of the following is the percent increase in revenue last year, from the year before?