PSLE
The pie charts show the number of each type of stationery in 2 stationery boxes, B and C. The total number of stationery in Box B is twice the total number of stationery in Box C.

1. Find the percentage of glues in Box B.
2. What fraction of stationery in Box C is glues?
3. The number of glues in Box B is 120. Find the number of glues in Box C.

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

Percentage of rulers in Box B = 25%

Percentage of glues in Box B
= 100% - 45% - 25%
= 30%

(b)
Percentage of glues in Box C
= 100% - 45% - 30%
= 25%

Fraction of stationery in Box C that is glues
= ¹₄

(c)
30% of stationery in Box B = 120
1% of stationery in Box B = 120 ÷ 30 = 4 
100% of the stationery in Box B = 100 x 4 = 400

Number of stationery in Box C
= 400 ÷ 2
= 200

100% of stationery in Box C = 200
1% of stationery in Box B = 200 ÷ 100 = 2
25% of stationery in Box B = 25 x 2 = 50  

Number of glues in Box C = 50

Answer(s): (a) 30%; (b) ¹₄; (c) 50