Question

1. The marked price of a book is Rs 100. The shopkeeper gives 25%
discount on it. What is the sale price of the book ?

(a) Rs 100

(b) Rs 25

(c) Rs 125

(d) Rs 75.

Answer 1

Selling price=(1-d/100)×marked price

=(1-25/100)×100

=(100-25/100)×100

=75/100×100

=75

Answer 2

➤ Given :-

Marked price (MP) :- ₹ 100

Discount percentage :- 25%

➤ To Find :-

Sale price of the book.........

➤ Formula required :-

$\tt \big \orange {\boxed{ \tt \gray {Marked \: price-(Discount \: Percentage \times Marked \: Price) }}}$

➤ Solution :-

$\to\tt100 -( 25 \bf\% \: \: \sf of \: \tt \: 100)$

$\to \tt 100 - \bigg( \dfrac{25}{100} \times 100 \bigg)$

$\tt \to 100 - \bigg( \dfrac{25}{ \cancel{100}} \times \cancel{100} \bigg) = \boxed{ \tt100 - ( 25 \times 1) }$

$\tt \to100 - 25 = \boxed{ \tt75}$

$\Huge\therefore$The sale price of the book is ₹ 75.

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$\dashrightarrow$ Some related formulas :-

Profit :- $\boxed{\tt SP-CP}$

Loss :- $\boxed{\tt CP-SP}$

Profit percentage :- $\boxed{\tt Profit \div CP \times 100}$

Loss percentage :- $\boxed{\tt Loss \div CP \times 100}$