PSLE The bar graph shows the number of storybooks read by a class from May to August. The number of storybooks read in May is not shown.
- What was the percentage decrease in the number of storybooks read from July to August?
- The average number of books read in a month from May to August was 55. How many books did the class read in May?
(a)
One interval = 1 u
Decrease in the number of storybook reads from July to August
= 5 u - 3 u
= 2 u
Percentage increase in the number of storybooks read from from July to August
=
25 x 100%
= 40%
(b)
Total number of storybooks read from May to August
= 4 x 55
= 220
Number of storybooks read from June to August
= 100 + 50 + 30
= 180
Number of storybooks read in May
= 220 - 180
= 40
Answer(s): (a) 40%; (b) 40