PSLE The bar graph shows the number of storybooks read by a class from February to May. The number of storybooks read in February is not shown.
- What was the percentage decrease in the number of storybooks read from April to May?
- The average number of books read in a month from February to May was 60. How many books did the class read in February?
(a)
One interval = 1 u
Decrease in the number of storybook reads from April to May
= 8 u - 6 u
= 2 u
Percentage increase in the number of storybooks read from from April to May
=
28 x 100%
= 25%
(b)
Total number of storybooks read from February to May
= 4 x 60
= 240
Number of storybooks read from March to May
= 60 + 80 + 60
= 200
Number of storybooks read in February
= 240 - 200
= 40
Answer(s): (a) 25%; (b) 40