The unit rate of 1/4 book 1/3 hour in books per hour is 3/4 books per hour.
Unit rate is the rate of a quantity in terms of another quantity per unit.
Unit rate(books per hour) = Number of books / Number of hours
= 1/4 ÷ 1/3
= 1/4 × 3/1
= (1×3) / (4×1)
= 3/4 books per hour
Therefore, the unit rate of 1/4 book 1/3 hour in books per hour is 3/4 books per hour.
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