Answer:
D
Step-by-step explanation:
To find each ratio, we need to divide the the cost by the amount of lessons. Lets start with Package A.
Package A is 90 dollars for 10 lessons. Lets divide 90 by 10.
90/10=9
So Package A is 9 dollars per lesson
Package B is 160 dollars for 20 lessons. Lets divide 160 by 20
160/20=16/2=8
Package B is 8 dollars per lesson.
Package C is 80 dollars for 10 lessons. So divide 80 by 10.
80/10=8
Package C is 8 dollars per lesson
Package D is 120 dollars for 20 dollars. So divide 120 by 20.
120/20=12/2=6
Package D is 6 dollars per lesson.
Package D is the best deal with the lowest dollar to lesson ratio
