Question

If cost price of 25 notebook is equal to selling price of 20 note notebools. find the profit or loss percentage?

Answer 1

$\textsf{Answer :}$

$\textsf{Loss = 20\%}$

$\textsf{Explaination}$

$\tt{\large{\rightarrow Cost \: price \: of \: 25 \: books}}$

$\mathbf{\large{25\times x=25x}}$

$\tt{\large{\rightarrow selling \: price \: of \: 20 \: books}}$

$\mathbf{\large{20\times x = 20x}}$


$\tt{\large{\rightarrow Cost \: Price > Selling \: Price}}$

$\tt{\large{\rightarrow \therefore \: it \: is \: loss }}$

$\tt{\large{\rightarrow \: loss \: = cp - sp }}$

$\tt{\large{\rightarrow 5}}$

$\tt{\large{\rightarrow loss\% = \dfrac{loss}{cp} \times 100 }}$

$\tt{\large{\rightarrow \dfrac{5}{25} \times 100 }}$

$\tt{\large{\rightarrow \dfrac{5}{\cancel{25} \: ^{1} } \times {\cancel{100} \: \: ^{4} }}}$

$\tt{\large{\rightarrow 5 \times 4}}$

$\tt{\large{\rightarrow 20\%}}$

$\therefore$The loss percentage is 20%