PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, X and Y. The total number of stationery in Box X is four times the total number of stationery in Box Y.
- Find the percentage of post-it pads in Box X.
- What fraction of stationery in Box Y is post-it pads?
- The number of post-it pads in Box X is 360. Find the number of post-it pads in Box Y.
(a)
90°360° = 25% of stationery in Box X
Percentage of files in Box X = 25%
Percentage of post-it pads in Box X
= 100% - 30% - 25%
= 45%
(b)
Percentage of post-it pads in Box Y
= 100% - 55% - 25%
= 20%
Fraction of stationery in Box Y that is post-it pads
= 20100
=
15 (c)
45% of stationery in Box X = 360
1% of stationery in Box X = 360 ÷ 45 = 8
100% of the stationery in Box X = 100 x 8 = 800
Number of stationery in Box Y
= 800 ÷ 4
= 200
100% of stationery in Box Y = 200
1% of stationery in Box X = 200 ÷ 100 = 2
20% of stationery in Box X = 20 x 2 = 40
Number of post-it pads in Box Y = 40
Answer(s): (a) 45%; (b)
15; (c) 40