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 four times the total number of stationery in Box U.
- Find the percentage of files in Box T.
- What fraction of stationery in Box U is files?
- The number of files in Box T is 360. Find the number of files in Box U.
(a)
90°360° = 25% of stationery in Box T
Percentage of markers in Box T = 25%
Percentage of files in Box T
= 100% - 30% - 25%
= 45%
(b)
Percentage of files in Box U
= 100% - 60% - 25%
= 15%
Fraction of stationery in Box U that is files
= 15100
=
320 (c)
45% of stationery in Box T = 360
1% of stationery in Box T = 360 ÷ 45 = 8
100% of the stationery in Box T = 100 x 8 = 800
Number of stationery in Box U
= 800 ÷ 4
= 200
100% of stationery in Box U = 200
1% of stationery in Box T = 200 ÷ 100 = 2
15% of stationery in Box T = 15 x 2 = 30
Number of files in Box U = 30
Answer(s): (a) 45%; (b)
320; (c) 30