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

1. Find the percentage of pencils in Box X.
2. What fraction of stationery in Box Y is pencils?
3. The number of pencils in Box X is 120. Find the number of pencils in Box Y.

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

Percentage of correction tapes in Box X = 25%

Percentage of pencils in Box X
= 100% - 55% - 25%
= 20%

(b)
Percentage of pencils in Box Y
= 100% - 60% - 20%
= 20%

Fraction of stationery in Box Y that is pencils
= ¹₅

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

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

100% of stationery in Box Y = 300
1% of stationery in Box X = 300 ÷ 100 = 3
20% of stationery in Box X = 20 x 3 = 60  

Number of pencils in Box Y = 60

Answer(s): (a) 20%; (b) ¹₅; (c) 60