PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, D and E. The total number of stationery in Box D is four times the total number of stationery in Box E.
- Find the percentage of notebooks in Box D.
- What fraction of stationery in Box E is notebooks?
- The number of notebooks in Box D is 320. Find the number of notebooks in Box E.
(a)
90°360° = 25% of stationery in Box D
Percentage of punchers in Box D = 25%
Percentage of notebooks in Box D
= 100% - 35% - 25%
= 40%
(b)
Percentage of notebooks in Box E
= 100% - 45% - 30%
= 25%
Fraction of stationery in Box E that is notebooks
= 25100
=
14 (c)
40% of stationery in Box D = 320
1% of stationery in Box D = 320 ÷ 40 = 8
100% of the stationery in Box D = 100 x 8 = 800
Number of stationery in Box E
= 800 ÷ 4
= 200
100% of stationery in Box E = 200
1% of stationery in Box D = 200 ÷ 100 = 2
25% of stationery in Box D = 25 x 2 = 50
Number of notebooks in Box E = 50
Answer(s): (a) 40%; (b)
14; (c) 50