Answer:
1/3 or 0.3333... of a book each day
Explanation:
To find how many books Joseph can read in a day, we would take how many books he can read and the amount of days it would take.
4 / 12 = 0.3333...
To find the answer in fraction form, we would just reduce 4 / 12 by dividing the numerator and denominator by the GCF, 4.
4 / 4 = 1
12 / 4 = 3
4 / 12 = 1 / 3