If the cost of 20 articles is equal to the selling price of 16 articles. What is the profit percent? 1. 25% 2. 30% 3. 45% 4. 50% 5. 60% Method 1: Let the cp of 1 article be $1. cp of 20 articles=$20 sp of 16 articles=$20 sp of 1 article=$20/16=5/4 Therefore, profit=5/41=1/4. The amount gained on $1 is $1/4 The amount gained on $100 is $100/4=25 Therefore, profit percent=25%. Method 2: Profit percentage = {(selling price  cost price)/cost price} x 100 =(selling price/cost price)  (cost price/cost price )= (selling price/cost price)  1 If CP is the cost price of the item and SP is the selling price of the item then 20CP=16SP SP/CP= 20/16 Profit percentage ={ (selling price/cost price)  1 }x100 = (20/16)1= (1/4) x 100 =25% 
