PSLEThe 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.
- Find the percentage of foolscaps in Box X.
- What fraction of stationery in Box Y is foolscaps?
- The number of foolscaps in Box X is 80. Find the number of foolscaps in Box Y.
(a)
90°360° = 25% of stationery in Box X
Percentage of pencils in Box X = 25%
Percentage of foolscaps in Box X
= 100% - 55% - 25%
= 20%
(b)
Percentage of foolscaps in Box Y
= 100% - 65% - 15%
= 20%
Fraction of stationery in Box Y that is foolscaps
= 20100
=
15 (c)
20% of stationery in Box X = 80
1% of stationery in Box X = 80 ÷ 20 = 4
100% of the stationery in Box X = 100 x 4 = 400
Number of stationery in Box Y
= 400 ÷ 2
= 200
100% of stationery in Box Y = 200
1% of stationery in Box X = 200 ÷ 100 = 2
20% of stationery in Box X = 20 x 2 = 40
Number of foolscaps in Box Y = 40
Answer(s): (a) 20%; (b)
15; (c) 40