PSLE
The 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 thrice the total number of stationery in Box W.

1. Find the percentage of glues in Box V.
2. What fraction of stationery in Box W is glues?
3. The number of glues in Box V is 240. Find the number of glues in Box W.

(a)
^90°_360° = 25% of stationery in Box V

Percentage of notebooks in Box V = 25%

Percentage of glues in Box V
= 100% - 35% - 25%
= 40%

(b)
Percentage of glues in Box W
= 100% - 40% - 25%
= 35%

Fraction of stationery in Box W that is glues
= ⁷₂₀

(c)
40% of stationery in Box V = 240
1% of stationery in Box V = 240 ÷ 40 = 6 
100% of the stationery in Box V = 100 x 6 = 600

Number of stationery in Box W
= 600 ÷ 3
= 200

100% of stationery in Box W = 200
1% of stationery in Box V = 200 ÷ 100 = 2
35% of stationery in Box V = 35 x 2 = 70  

Number of glues in Box W = 70

Answer(s): (a) 40%; (b) ⁷₂₀; (c) 70