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

1. Find the percentage of highlighters in Box A.
2. What fraction of stationery in Box B is highlighters?
3. The number of highlighters in Box A is 80. Find the number of highlighters in Box B.

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

Percentage of staplers in Box A = 25%

Percentage of highlighters in Box A
= 100% - 35% - 25%
= 40%

(b)
Percentage of highlighters in Box B
= 100% - 60% - 15%
= 25%

Fraction of stationery in Box B that is highlighters
= ¹₄

(c)
40% of stationery in Box A = 80
1% of stationery in Box A = 80 ÷ 40 = 2 
100% of the stationery in Box A = 100 x 2 = 200

Number of stationery in Box B
= 200 ÷ 2
= 100

100% of stationery in Box B = 100
1% of stationery in Box A = 100 ÷ 100 = 1
25% of stationery in Box A = 25 x 1 = 25  

Number of highlighters in Box B = 25

Answer(s): (a) 40%; (b) ¹₄; (c) 25