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

1. Find the percentage of punchers in Box U.
2. What fraction of stationery in Box V is punchers?
3. The number of punchers in Box U is 120. Find the number of punchers in Box V.

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

Percentage of files in Box U = 25%

Percentage of punchers in Box U
= 100% - 55% - 25%
= 20%

(b)
Percentage of punchers in Box V
= 100% - 40% - 30%
= 30%

Fraction of stationery in Box V that is punchers
= ³₁₀

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

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

100% of stationery in Box V = 300
1% of stationery in Box U = 300 ÷ 100 = 3
30% of stationery in Box U = 30 x 3 = 90  

Number of punchers in Box V = 90

Answer(s): (a) 20%; (b) ³₁₀; (c) 90