PSLE The bar graph shows the number of storybooks read by a class from April to July. The number of storybooks read in April is not shown.
- What was the percentage decrease in the number of storybooks read from June to July?
- The average number of books read in a month from April to July was 85. How many books did the class read in April?
(a)
One interval = 1 u
Decrease in the number of storybook reads from June to July
= 10 u - 9 u
= 1 u
Percentage increase in the number of storybooks read from from June to July
=
110 x 100%
= 10%
(b)
Total number of storybooks read from April to July
= 4 x 85
= 340
Number of storybooks read from May to July
= 90 + 100 + 90
= 280
Number of storybooks read in April
= 340 - 280
= 60
Answer(s): (a) 10%; (b) 60