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 twice the total number of stationery in Box W.

1. Find the percentage of rulers in Box V.
2. What fraction of stationery in Box W is rulers?
3. The number of rulers in Box V is 210. Find the number of rulers in Box W.

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

Percentage of pens in Box V = 25%

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

(b)
Percentage of rulers in Box W
= 100% - 60% - 15%
= 25%

Fraction of stationery in Box W that is rulers
= ¹₄

(c)
35% of stationery in Box V = 210
1% of stationery in Box V = 210 ÷ 35 = 6 
100% of the stationery in Box V = 100 x 6 = 600

Number of stationery in Box W
= 600 ÷ 2
= 300

100% of stationery in Box W = 300
1% of stationery in Box V = 300 ÷ 100 = 3
25% of stationery in Box V = 25 x 3 = 75  

Number of rulers in Box W = 75

Answer(s): (a) 35%; (b) ¹₄; (c) 75