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