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 folders in Box E.
2. What fraction of stationery in Box F is folders?
3. The number of folders in Box E is 400. Find the number of folders in Box F.

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

Percentage of correction tapes in Box E = 25%

Percentage of folders in Box E
= 100% - 35% - 25%
= 40%

(b)
Percentage of folders in Box F
= 100% - 45% - 30%
= 25%

Fraction of stationery in Box F that is folders
= ¹₄

(c)
40% of stationery in Box E = 400
1% of stationery in Box E = 400 ÷ 40 = 10 
100% of the stationery in Box E = 100 x 10 = 1000

Number of stationery in Box F
= 1000 ÷ 5
= 200

100% of stationery in Box F = 200
1% of stationery in Box E = 200 ÷ 100 = 2
25% of stationery in Box E = 25 x 2 = 50  

Number of folders in Box F = 50

Answer(s): (a) 40%; (b) ¹₄; (c) 50