Definition:
 Cost price: If any article or item buys for sell then we called them cost price.
 Selling price: If any article or item buys for use (consume) then we called them selling price.
Some use full formula
Profit= Sell price – Cost price
Loss= Cost price – Sell price
Note: Loss or gain is always reckoned on cost price.
Profit % = (Profit/Cost price)*100.
Loss % = (Loss/Cost price)*100.
Selling Price =(( (100+or – (profit/Loss)%)*c)/100.
% Sell price = % cost price + % Profit.
We will never use these formulas during solving the question we will only use concept.
>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>Type1<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
 A man buys a cycle for Rs. 1400 and sells it at a loss of 15% what is selling price of the Cycle?
Solution: 1^{st} method, Selling price= ((10015)*1400)/100
= (85*1400)/100
= 1190
Second Method = 100%=1400
= 85% =?
= 1190
 A Television is purchased at Rs 5000 and sold at 40, find the loss percentage.
Solution: Loss % = ( (50004000)*100)/ 5000
= 20%
 A book was sold for Rs 27.50 with a profit of 10%, if it were sold for Rs 25.75, then would have been percentage of profit and loss.
 If the cost price is 25% of selling price, then what is the profit percentage?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Type 2<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
 A mobile was sold at a loss of 8 % it was observed that if the selling price was Rs. 540 more, the profit made would have been 10 %, what is the actual selling price of the mobile.
Solution:
On loss  On profit 
92% 110%
540 18% = 540 1% = 540/18 92 % = (540*92)/18 Rupees= 2760

18% = 540
1 =540/18 110 = (540/18)*110 Rupees = 3300

 A man gains 20% by selling an article for certain price, If he sells it at double the price, the % of profit will be?.
Solution:
Gain= 120%
Cost price 100% Selling price =120% 2 S = 240 % S= 140% 
 A plot is sold for Rs. 18,700 with a loss of 15%, at what price it should be sold to get profit of 15%.?
 Ravi sold 16 pens at the cost of 20 pens what is the profit and loss percentage made by him?
 A shopkeeper expects a gain of 45/2% on his cost price , if his sale was Rs 392, Then find his profit.
 Alfred Buys an old scooter for Rs. 4700 and spends Rs. 800 on its repair if he sells the scooter for Rs 5800, his gain % is what?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Type – 3<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
 Marked price and discount
We can say that marked price is List price / Tag price = % Discount
% profit
COST PRICE
% Loss
Sell price = Marked price – Discount  Profit & Loss 
Marked price we will let always 100  Cost price = 100 
 An article was sold for 490 after giving discount of 30%, what is marked Price?
Solution: 
Marked price =100%
Sell price 10030 = 70% 100% * Marked price = 490 After calculation we will get Marked price = 700

 A Merchant marked the price on his good 20 % more than its cost profit and allows a discount of 15% his profit percentage is ?
1^{st} method  Effective % 
Marked price =100
Marked price 120% *15%=18 Sell price = 102 Cost price = 100% Difference = 2% 
a+b+(a*b)/100)
Profit %=2015300/100 =2018 = 2 
 A shopkeeper offers a discount of 10 % on his article, The marked price of article is Rs 450, The selling price should be?
 After allowing a discount of 16% , There was still a gain of 7.5% then the percentage of marked price over the cost?
 If a discount 10% given on the marked price of a book, the publisher gain 20%, if the discount is increasing to 15% the gain of publisher is?
 A trader gain 12% after selling a book at 10% discount on the printed price the ratio of the cost price and printed price of the item is?
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<Type – 4<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
DISHONEST SHOPKEEPER
 A dishonest dealer professes to sell his goods a cost price, but uses a weight of 960 gram for a kg weight. Find his gain percentage.
Let 1000 gram = 1000 rupees
1 gram = 1 rupees Sell price = 1000 Cost price = 960 % profit = (40*100)/960= 4.166%

 A Seller uses 920gram in place of 1 kg to sell his good when he sells his article at 15% gain on cost price, the actual percentage of profit is?
1000gram 115 sell price = 1150
920gram Cost price Percentage profit= (230*100)/920= 25%

 A dealer sells goods at 6% discount but uses 14gram instead of 16kg, what is his % profit and loss?
 A dealer sell goods at 20% discount but uses 4% his weight what is his % profit or loss?
 A dishonest seller marks his item at 20% above the cost price and also allows a discount of 15% but uses 900gram instead of 1kg. find the profit or loss %?
 A shopkeeper cheats to the extent of 20% while buying as well as selling item using false weight his gain is?
Effective formula
= 20+20+((20*20)/100) = 44 unit 
 A retailer cheats both while buying and selling goods from the shopkeeper hi uses a weighting machine that show 1000 gram instead of 1100 gram and while selling, he uses a machine that sells goods at the cost price only determine his profit percentage in this transaction.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Type – 5<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
 A sold an book to B at profit of 20% and B Sold it the some Book at C at a profit of 10% if C bought it for Rs. 396. How much did A Pay for it?
A+20 B+10 C
32% 132%=396 100%=? (396*100)/132=300

 Ravi bought a book at 25 % discount on its original price, he sold it 50% increase on the price he bought it . The new sale price is by what % more than the original price.
20+50((25*50)/100)
=12.5

M=100 112.5
25
75*50=375 375/11.5

 A sells on article to B at loss of 20% B TO C at gain of 15%, C to D AT loss of 5% and D to E at a profit of 10%, I E had to pay Rs 500, how much did A pay for it?
 A shopkeeper marked the selling price of book at 12% above the cost price, At the time of selling he allow certain discount and suffer a loss of 2%, find the discount percentage ?
 The difference of the cost price and selling price of an article is Rs 360. If the profit is 20%, then the selling price is?
 A fruit seller buys some oranges at the rate of 4 for Rs 10 and an equal number more ate 5 for RS10. He sells the whole lost at 9 for Rs 20, what is his loss or gain %?
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