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

1. Find the percentage of correction tapes in Box Q.
2. What fraction of stationery in Box R is correction tapes?
3. The number of correction tapes in Box Q is 120. Find the number of correction tapes in Box R.

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

Percentage of highlighters in Box Q = 25%

Percentage of correction tapes in Box Q
= 100% - 45% - 25%
= 30%

(b)
Percentage of correction tapes in Box R
= 100% - 55% - 20%
= 25%

Fraction of stationery in Box R that is correction tapes
= ¹₄

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

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

100% of stationery in Box R = 200
1% of stationery in Box Q = 200 ÷ 100 = 2
25% of stationery in Box Q = 25 x 2 = 50  

Number of correction tapes in Box R = 50

Answer(s): (a) 30%; (b) ¹₄; (c) 50