When the Price of fans was reduced by 20 %. The number of fans sold increased by 40 %. What was the effect on the sales of rupees?

A. 12 % Increase
B. 12 % decrease
C. 30 % increase
D. 40 % increase
Explanation:
Original cost of each is Rs. 100 and number originally sold be 100
Original sale proceed = Rs. (100 × 100) = Rs. 10000
New sale proceed = Rs. (80 × 140) = Rs. 11200
Increase % = (1200/10000 × 100)% = 12%