PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, W and X. The total number of stationery in Box W is five times the total number of stationery in Box X.
- Find the percentage of post-it pads in Box W.
- What fraction of stationery in Box X is post-it pads?
- The number of post-it pads in Box W is 100. Find the number of post-it pads in Box X.
(a)
90°360° = 25% of stationery in Box W
Percentage of glues in Box W = 25%
Percentage of post-it pads in Box W
= 100% - 55% - 25%
= 20%
(b)
Percentage of post-it pads in Box X
= 100% - 65% - 15%
= 20%
Fraction of stationery in Box X that is post-it pads
= 20100
=
15 (c)
20% of stationery in Box W = 100
1% of stationery in Box W = 100 ÷ 20 = 5
100% of the stationery in Box W = 100 x 5 = 500
Number of stationery in Box X
= 500 ÷ 5
= 100
100% of stationery in Box X = 100
1% of stationery in Box W = 100 ÷ 100 = 1
20% of stationery in Box W = 20 x 1 = 20
Number of post-it pads in Box X = 20
Answer(s): (a) 20%; (b)
15; (c) 20