Question

Write formula of finding selling and cost price when profit or loss percent is given.

Answer 1

There are many formulae for finding cost price, but it all depends on the type of question you get. For example,

1. Cost price = Selling price − profit ( when selling price and profit is given )
   
2. Cost price = Selling price + loss ( when selling price and loss is given )
   
3. Cost price $=100\times \frac{SellingPrice}{100+Profit\%}$ ( when selling price and profit % is given )
   
4. Cost price $=100\times \frac{SellingPrice}{100-loss\%}$ ( when selling price and loss % is given )

So, there are total 4 formulae for finding the cost price in a given question.