Question

Amina bought a book₹75 and sold it at a loss of 15% find the selling price of book​?

Answer 1

$\bigstar$ According To Question ;

• Cost Price of Book is equal to ₹ 75 and The Loss Percent is 15 %
• We need to find the Selling Price of Book

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We know Loss Percent can be calculated by Finding value of Cost Price - Selling Price and dividing it by Cost Price or Loss Percent can be calculated by Finding Loss and dividing it by Cost Price

$\longrightarrow\textsf{Loss Percent = (Cost Price - Selling Price)/Cost Price}$

Substitute the values that are known. We know that : Cost Price is 75 and Loss Percent is 15 % (Values given in Question)

$\longrightarrow\sf{15\% = (75 - Selling\: Price)/75}$

Multiply Both Sides of the Equation by 75

$\longrightarrow\sf{15\%\times 75 = (75 - Selling\: Price)/75\times 75}\longrightarrow\sf{15\%\times 75 = 75 - Selling\: Price}$

We know that : $\sf{a\% = a/100}$ . Now Here a = 15, Hence $\sf{15\% = 15/100}$

$\longrightarrow\sf{15/100\times 75 = 75 - Selling\: Price}$

$\longrightarrow\sf{15/4\times 3 = 75 - Selling\: Price}\longrightarrow\sf{45/4 = 75 - Selling\: Price}$

Subtract 75 from Both Sides of the Equation

$\longrightarrow\sf{45/4 - 75 = 75 - Selling\: Price - 75}\longrightarrow\sf{45/4 - 300/4 = - Selling\: Price}$

$\boxed{\longrightarrow\sf{Selling\: Price = -(45/4 - 300/4) = -(-255/4) = 255/4 = 63.75}}$

Hence Selling Price of Book is equal to ₹ 63.75

Answer 2

Answer:

sp of the book = 75(1-15/100)

Step-by-step explanation:

75*(85/100)

75 and 100 get cancelled

3*(85/4)

3*21.25

63.75