Answer:
she read each day 1/8 of the book
Explanation:
Nikia already had 1/2 book read, and she finish reading it in 4 days, if she read the same amount every day we can divide half the book into the number of days and know how much she read each day
(1/2) / 4 = 1/8
this means that every day Nikia read 1/8 of the book for 4 days