The line graph shows the number of skirts sold by a shop from September to February in 2012.
- What was the average number of skirts sold per month from September to February in 2012?
- The total number of skirts sold for the same period from September to February in 2011 was 900. Find the percentage decrease in the total number of skirts sold for the same period from 2011 to 2012
(a)
Total skirts sold from September to February in 2012
= 57 + 46 + 50 + 72 + 43 + 92
= 360
Average skirts sold from September to February in 2012
= 360 ÷ 6
= 60
(b)
Decrease in the number of skirts sold
= 900 - 360
= 540
Percentage decrease in the total number of skirts sold from 2011 to 2012
=
540900 x 100%
=
35x 100%
= 60%
Answer(s): (a) 60; (b) 60%