PSLE
The pie charts show the number of each type of stationery in 2 stationery boxes, F and G. The total number of stationery in Box F is thrice the total number of stationery in Box G.

1. Find the percentage of notebooks in Box F.
2. What fraction of stationery in Box G is notebooks?
3. The number of notebooks in Box F is 120. Find the number of notebooks in Box G.

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

Percentage of glues in Box F = 25%

Percentage of notebooks in Box F
= 100% - 55% - 25%
= 20%

(b)
Percentage of notebooks in Box G
= 100% - 65% - 20%
= 15%

Fraction of stationery in Box G that is notebooks
= ³₂₀

(c)
20% of stationery in Box F = 120
1% of stationery in Box F = 120 ÷ 20 = 6 
100% of the stationery in Box F = 100 x 6 = 600

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

100% of stationery in Box G = 200
1% of stationery in Box F = 200 ÷ 100 = 2
15% of stationery in Box F = 15 x 2 = 30  

Number of notebooks in Box G = 30

Answer(s): (a) 20%; (b) ³₂₀; (c) 30