The line graph shows the number of vests sold by a shop from December to May in 2010.
- What was the average number of vests sold per month from December to May in 2010?
- The total number of vests sold for the same period from December to May in 2009 was 960. Find the percentage decrease in the total number of vests sold for the same period from 2009 to 2010
(a)
Total vests sold from December to May in 2010
= 96 + 47 + 68 + 39 + 69 + 77
= 396
Average vests sold from December to May in 2010
= 396 ÷ 6
= 66
(b)
Decrease in the number of vests sold
= 960 - 396
= 564
Percentage decrease in the total number of vests sold from 2009 to 2010
=
564960 x 100%
=
4780x 100%
= 58.75%
Answer(s): (a) 66; (b) 58.75%