Answer: 0.5 or half page
Step-by-step explanation:
Given : Emma can read 4 pages of a book in 8 minutes.
Then her rate of reading is given by :-
[tex]\dfrac{\text{Number of pages read}}{\text{Time (minute)}}\\\\=\dfrac{4}{8}\\\\=0.5\text{ pages per minute}[/tex]
Hence, she reads 0.5 of a page in each minurte.