Three roommates do 20 hours of chores. 6 hours by stephen, 8 hours by tom, and 6 hours jenny what fraction of the household chores are done by stephen

  3/10

Step-by-step explanation:

Stephen works 6 hours of the total of 20 hours worked. If the chores are proportional to the time worked, then Stephen does 6/20 = 3/10 of the chores.

Your answer is 1 more student.

Step-by-step explanation:

For the class to be held it need 16.25 students.

I got that number by multiplying 25 by .65

Because we can't have .25 of a student, and were talking about the minimum requirement. Having less than 16.25 would mean that we wouldn't have the class, so we need 17 students.