PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, A and B. The total number of stationery in Box A is twice the total number of stationery in Box B.
- Find the percentage of foolscaps in Box A.
- What fraction of stationery in Box B is foolscaps?
- The number of foolscaps in Box A is 350. Find the number of foolscaps in Box B.
(a)
90°360° = 25% of stationery in Box A
Percentage of files in Box A = 25%
Percentage of foolscaps in Box A
= 100% - 40% - 25%
= 35%
(b)
Percentage of foolscaps in Box B
= 100% - 40% - 30%
= 30%
Fraction of stationery in Box B that is foolscaps
= 30100
=
310 (c)
35% of stationery in Box A = 350
1% of stationery in Box A = 350 ÷ 35 = 10
100% of the stationery in Box A = 100 x 10 = 1000
Number of stationery in Box B
= 1000 ÷ 2
= 500
100% of stationery in Box B = 500
1% of stationery in Box A = 500 ÷ 100 = 5
30% of stationery in Box A = 30 x 5 = 150
Number of foolscaps in Box B = 150
Answer(s): (a) 35%; (b)
310; (c) 150