Easy % question with adding

17.00

Step-by-step explanation:

So first you have to add 12.35 to 7.5% which equals 13.27625.

Then you round 13.27625 to the nearest 0.01 or hundredths place and that gives you 13.28.

Then you add 25% to 13.28 and that gives you 16.6 and if you round 16.6 you get 17.00.

I hope I helped! Please give a Rate and Thanks.

19/91

Step-by-step explanation:

In total, there are 91 combinations of student preferences and reading amounts. Out of these, 19 read about three hours a week of paperback books. 19/91 cannot be simplified, so it is the final answer. Hope this helps!