The line graph shows the number of coats sold by a shop from July to December in 2010.
- What was the average number of coats sold per month from July to December in 2010?
- The total number of coats sold for the same period from July to December in 2009 was 875. Find the percentage decrease in the total number of coats sold for the same period from 2009 to 2010
(a)
Total coats sold from July to December in 2010
= 72 + 94 + 61 + 84 + 84 + 67
= 462
Average coats sold from July to December in 2010
= 462 ÷ 6
= 77
(b)
Decrease in the number of coats sold
= 875 - 462
= 413
Percentage decrease in the total number of coats sold from 2009 to 2010
=
413875 x 100%
=
59125x 100%
= 47.2%
Answer(s): (a) 77; (b) 47.2%