The line graph shows the number of sweaters sold by a shop from March to August in 2011.
- What was the average number of sweaters sold per month from March to August in 2011?
- The total number of sweaters sold for the same period from March to August in 2010 was 840. Find the percentage decrease in the total number of sweaters sold for the same period from 2010 to 2011
(a)
Total sweaters sold from March to August in 2011
= 69 + 38 + 98 + 98 + 98 + 61
= 462
Average sweaters sold from March to August in 2011
= 462 ÷ 6
= 77
(b)
Decrease in the number of sweaters sold
= 840 - 462
= 378
Percentage decrease in the total number of sweaters sold from 2010 to 2011
=
378840 x 100%
=
920x 100%
= 45%
Answer(s): (a) 77; (b) 45%