If \(\frac{4}{5}\) were sold then \(\frac{1}{5}\) were not sold.
According to the post, 25 remained unsold, meaning 25=\(\frac{1}{5}\) of the total books. 25 x 4 (portion of books that were sold)= 100 x 6.40= 640
Answer E
According to the post, 25 remained unsold, meaning 25=\(\frac{1}{5}\) of the total books. 25 x 4 (portion of books that were sold)= 100 x 6.40= 640
Answer E
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