PSLE The bar graph shows the number of storybooks read by a class from April to July. The number of storybooks read in July is not shown.
- What was the percentage increase in the number of storybooks read from April to May?
- The average number of books read in a month from April to July was 70. How many books did the class read in July?
(a)
One interval = 1 u
Increase in the number of storybooks read from April to May
= 9 u - 5 u
= 4 u
Percentage increase in the number of storybooks read from April to May
=
45 x 100%
= 80%
(b)
Total number of storybooks read from April to July
= 4 x 70
= 280
Number of storybooks read from April to June
= 50 + 90 + 70
= 210
Number of storybooks read in July
= 280 - 210
= 70
Answer(s): (a) 80%; (b) 70