The line graph shows the number of coats sold by a shop from April to September in 2010.
- What was the average number of coats sold per month from April to September in 2010?
- The total number of coats sold for the same period from April to September in 2009 was 864. Find the percentage decrease in the total number of coats sold for the same period from 2009 to 2010
(a)
Total coats sold from April to September in 2010
= 37 + 100 + 76 + 91 + 83 + 99
= 486
Average coats sold from April to September in 2010
= 486 ÷ 6
= 81
(b)
Decrease in the number of coats sold
= 864 - 486
= 378
Percentage decrease in the total number of coats sold from 2009 to 2010
=
378864 x 100%
=
716x 100%
= 43.75%
Answer(s): (a) 81; (b) 43.75%