she can read a total of 0.83 pages a minute if she reads at the pace she was reading at because if you take the amount of pages she read (7.5) and you divide by the amout of minutes read (9) then you can see if she read at a constant rate she would read 0.83 pages a minute
.....Yep.
Or is there a second part to this problem?
100(7/21) = ______%
And your answer is 33 and 1/3%