Question

A bookseller gains 30%by selling a book for RM 65.Find the cost price of the book .

Answer 1

$the \: cost \: price \: be \: x \\ the \: selling \: price \: be \: = 65 \\ gain\% = 30\% \\ c.p = \frac{s.p. \times 100}{100 + gain\%} \\ c.p = \frac{65 \times 100}{100 + 30} \\ c.p. = \frac{65}{30} \\ c.p = \frac{13}{6}$

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