Price of the book in her store is $ 25
<em><u>Solution:</u></em>
Given that, The bookstore buys a book for 20$
She marked up the price by 25% to sell it in her store
To find: Price of book in her store
From given,
Cost price = $ 20
Markup rate = 25 %
Which means, 25 % of $ 20 is markup price

Thus markup price is $ 5
Price of the book in her store = cost price + markup price
Price of the book in her store = 20 + 5 = 25
Thus Price of the book in her store is $ 25