Multiply minutes a week x 4 weeks each month.
Student A reads 400 minutes a month.
Student B reads 80 minutes a month.
Multiply minutes a month x 9 months in a school year.
Student A reads 3,600 minutes in a school year.
Student B reads 720 minutes in a school year.
By the end of the 6th grade, if Student A and Student B maintain the same reading habits,