Given:
Discount percentage = 40%
Sale price of the book = $18
To find:
Original price of the book
Solution:
Let us assume that the original price of the book as x. As per the question, there was 40% discount and the price of the book has been reduced to $18 which is 40% of the original price. That is,
[tex]\Rightarrow40\% \times x=\$18\rightarrow\frac{40}{100}\times x =\$18[/tex]
[tex]\Rightarrow x=\frac{18\times100}{40}\rightarrow x=\$45[/tex]
Therefore, the original price of the book is $45.
