The line graph shows the number of sweaters sold by a shop from May to October in 2011.
- What was the average number of sweaters sold per month from May to October in 2011?
- The total number of sweaters sold for the same period from May to October in 2010 was 792. Find the percentage decrease in the total number of sweaters sold for the same period from 2010 to 2011
(a)
Total sweaters sold from May to October in 2011
= 43 + 71 + 87 + 70 + 85 + 40
= 396
Average sweaters sold from May to October in 2011
= 396 ÷ 6
= 66
(b)
Decrease in the number of sweaters sold
= 792 - 396
= 396
Percentage decrease in the total number of sweaters sold from 2010 to 2011
=
396792 x 100%
=
12x 100%
= 50%
Answer(s): (a) 66; (b) 50%