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 folders in Box H.
- What fraction of stationery in Box J is folders?
- The number of folders in Box H is 360. Find the number of folders in Box J.
(a)
90°360° = 25% of stationery in Box H
Percentage of files in Box H = 25%
Percentage of folders in Box H
= 100% - 35% - 25%
= 40%
(b)
Percentage of folders in Box J
= 100% - 50% - 20%
= 30%
Fraction of stationery in Box J that is folders
= 30100
=
310 (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
30% of stationery in Box H = 30 x 3 = 90
Number of folders in Box J = 90
Answer(s): (a) 40%; (b)
310; (c) 90