Astudent reads 21 1/4 pages of a history book in 2/3 of an hour what is her unit rate in pages per hour

31.875 or 32
21 1/4 can be written as 21.25 and divide it by 2(21.25 is 2 out of three of the hour) 21.25 divided by 2 is 10.625 which equals to 1/3 of an hour.now do 10.625 times 3 and it is 31.875 or rounded to 32 pages per hour. it can be rounded to 31.88 as well.

Add up all the sides

Ibelieve that c. recording would work best.