PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, N and P. The total number of stationery in Box N is twice the total number of stationery in Box P.
- Find the percentage of staplers in Box N.
- What fraction of stationery in Box P is staplers?
- The number of staplers in Box N is 160. Find the number of staplers in Box P.
(a)
90°360° = 25% of stationery in Box N
Percentage of files in Box N = 25%
Percentage of staplers in Box N
= 100% - 35% - 25%
= 40%
(b)
Percentage of staplers in Box P
= 100% - 60% - 15%
= 25%
Fraction of stationery in Box P that is staplers
= 25100
=
14 (c)
40% of stationery in Box N = 160
1% of stationery in Box N = 160 ÷ 40 = 4
100% of the stationery in Box N = 100 x 4 = 400
Number of stationery in Box P
= 400 ÷ 2
= 200
100% of stationery in Box P = 200
1% of stationery in Box N = 200 ÷ 100 = 2
25% of stationery in Box N = 25 x 2 = 50
Number of staplers in Box P = 50
Answer(s): (a) 40%; (b)
14; (c) 50