Which expression correctly represents the unread portion of the book given 157 read out of 445?

Which expression correctly represents the unread portion of the book given 157 read out of 445?

• A. 157
• B. 445 minus 157
• C. 445
• D. 157/445

Answer: (B)

To find what's left unread, you start with the total and subtract the part that's already read. The book has 445 pages in total, and 157 pages have been read. So the unread portion is 445 minus 157. That difference is 288, meaning 288 pages remain unread. The other expressions don’t represent what's left: 157 is what’s been read, 445 is the whole book, and 157/445 is the fraction read, not the amount unread.

To find what's left unread, you start with the total and subtract the part that's already read. The book has 445 pages in total, and 157 pages have been read. So the unread portion is 445 minus 157. That difference is 288, meaning 288 pages remain unread. The other expressions don’t represent what's left: 157 is what’s been read, 445 is the whole book, and 157/445 is the fraction read, not the amount unread.