PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, M and N. The total number of stationery in Box M is twice the total number of stationery in Box N.
- Find the percentage of glues in Box M.
- What fraction of stationery in Box N is glues?
- The number of glues in Box M is 80. Find the number of glues in Box N.
(a)
90°360° = 25% of stationery in Box M
Percentage of punchers in Box M = 25%
Percentage of glues in Box M
= 100% - 55% - 25%
= 20%
(b)
Percentage of glues in Box N
= 100% - 55% - 20%
= 25%
Fraction of stationery in Box N that is glues
= 25100
=
14 (c)
20% of stationery in Box M = 80
1% of stationery in Box M = 80 ÷ 20 = 4
100% of the stationery in Box M = 100 x 4 = 400
Number of stationery in Box N
= 400 ÷ 2
= 200
100% of stationery in Box N = 200
1% of stationery in Box M = 200 ÷ 100 = 2
25% of stationery in Box M = 25 x 2 = 50
Number of glues in Box N = 50
Answer(s): (a) 20%; (b)
14; (c) 50