PSLE The bar graph shows the number of storybooks read by a class from January to April. The number of storybooks read in January is not shown.
- What was the percentage decrease in the number of storybooks read from March to April?
- The average number of books read in a month from January to April was 60. How many books did the class read in January?
(a)
One interval = 1 u
Decrease in the number of storybook reads from March to April
= 5 u - 3 u
= 2 u
Percentage increase in the number of storybooks read from from March to April
=
25 x 100%
= 40%
(b)
Total number of storybooks read from January to April
= 4 x 60
= 240
Number of storybooks read from February to April
= 100 + 50 + 30
= 180
Number of storybooks read in January
= 240 - 180
= 60
Answer(s): (a) 40%; (b) 60