Maribel purchased 15 yards of fabric for a project. She used all but 13 yards, How much
fabric did she use?

2 yards

Step-by-step explanation:

subtract 13 from 15

15-13=2

33

Step-by-step explanation:

The total number of students in seventh grade at Western Middle School = 220

The percent of the students in seventh grade have perfect attendance=15%

Then, the number of students have perfect attendance is given by :

15% of 220

Hence, 33 students have perfect attendance.