PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, V and W. The total number of stationery in Box V is twice the total number of stationery in Box W.
- Find the percentage of notebooks in Box V.
- What fraction of stationery in Box W is notebooks?
- The number of notebooks in Box V is 450. Find the number of notebooks in Box W.
(a)
90°360° = 25% of stationery in Box V
Percentage of pens in Box V = 25%
Percentage of notebooks in Box V
= 100% - 30% - 25%
= 45%
(b)
Percentage of notebooks in Box W
= 100% - 60% - 25%
= 15%
Fraction of stationery in Box W that is notebooks
= 15100
=
320 (c)
45% of stationery in Box V = 450
1% of stationery in Box V = 450 ÷ 45 = 10
100% of the stationery in Box V = 100 x 10 = 1000
Number of stationery in Box W
= 1000 ÷ 2
= 500
100% of stationery in Box W = 500
1% of stationery in Box V = 500 ÷ 100 = 5
15% of stationery in Box V = 15 x 5 = 75
Number of notebooks in Box W = 75
Answer(s): (a) 45%; (b)
320; (c) 75