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

1. Find the percentage of post-it pads in Box E.
2. What fraction of stationery in Box F is post-it pads?
3. The number of post-it pads in Box E is 200. Find the number of post-it pads in Box F.

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

Percentage of foolscaps in Box E = 25%

Percentage of post-it pads in Box E
= 100% - 35% - 25%
= 40%

(b)
Percentage of post-it pads in Box F
= 100% - 40% - 25%
= 35%

Fraction of stationery in Box F that is post-it pads
= ⁷₂₀

(c)
40% of stationery in Box E = 200
1% of stationery in Box E = 200 ÷ 40 = 5 
100% of the stationery in Box E = 100 x 5 = 500

Number of stationery in Box F
= 500 ÷ 5
= 100

100% of stationery in Box F = 100
1% of stationery in Box E = 100 ÷ 100 = 1
35% of stationery in Box E = 35 x 1 = 35  

Number of post-it pads in Box F = 35

Answer(s): (a) 40%; (b) ⁷₂₀; (c) 35