she can proofread 12 pages in 6 minutes.
then we need to find how many minutes it takes to proofread 1 page.
Since 12 pages take 6 minutes
then 1 page takes = 6 minutes / 12 pages = 0.5
then rate is 0.5 minutes / page.
so then if it takes 0.5 minutes to proofread 1 page then 96 pages it takes - 0.5 minutes / page x 96 pages
time taken = 48 minutes