PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, W and X. The total number of stationery in Box W is thrice the total number of stationery in Box X.
- Find the percentage of correction tapes in Box W.
- What fraction of stationery in Box X is correction tapes?
- The number of correction tapes in Box W is 315. Find the number of correction tapes in Box X.
(a)
90°360° = 25% of stationery in Box W
Percentage of rulers in Box W = 25%
Percentage of correction tapes in Box W
= 100% - 40% - 25%
= 35%
(b)
Percentage of correction tapes in Box X
= 100% - 75% - 15%
= 10%
Fraction of stationery in Box X that is correction tapes
= 10100
=
110 (c)
35% of stationery in Box W = 315
1% of stationery in Box W = 315 ÷ 35 = 9
100% of the stationery in Box W = 100 x 9 = 900
Number of stationery in Box X
= 900 ÷ 3
= 300
100% of stationery in Box X = 300
1% of stationery in Box W = 300 ÷ 100 = 3
10% of stationery in Box W = 10 x 3 = 30
Number of correction tapes in Box X = 30
Answer(s): (a) 35%; (b)
110; (c) 30