PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, T and U. The total number of stationery in Box T is thrice the total number of stationery in Box U.
- Find the percentage of glues in Box T.
- What fraction of stationery in Box U is glues?
- The number of glues in Box T is 360. Find the number of glues in Box U.
(a)
90°360° = 25% of stationery in Box T
Percentage of correction tapes in Box T = 25%
Percentage of glues in Box T
= 100% - 35% - 25%
= 40%
(b)
Percentage of glues in Box U
= 100% - 60% - 15%
= 25%
Fraction of stationery in Box U that is glues
= 25100
=
14 (c)
40% of stationery in Box T = 360
1% of stationery in Box T = 360 ÷ 40 = 9
100% of the stationery in Box T = 100 x 9 = 900
Number of stationery in Box U
= 900 ÷ 3
= 300
100% of stationery in Box U = 300
1% of stationery in Box T = 300 ÷ 100 = 3
25% of stationery in Box T = 25 x 3 = 75
Number of glues in Box U = 75
Answer(s): (a) 40%; (b)
14; (c) 75