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 twice the total number of stationery in Box U.
- Find the percentage of post-it pads in Box T.
- What fraction of stationery in Box U is post-it pads?
- The number of post-it pads in Box T is 80. Find the number of post-it pads in Box U.
(a)
90°360° = 25% of stationery in Box T
Percentage of glues in Box T = 25%
Percentage of post-it pads in Box T
= 100% - 35% - 25%
= 40%
(b)
Percentage of post-it pads in Box U
= 100% - 75% - 15%
= 10%
Fraction of stationery in Box U that is post-it pads
= 10100
=
110 (c)
40% of stationery in Box T = 80
1% of stationery in Box T = 80 ÷ 40 = 2
100% of the stationery in Box T = 100 x 2 = 200
Number of stationery in Box U
= 200 ÷ 2
= 100
100% of stationery in Box U = 100
1% of stationery in Box T = 100 ÷ 100 = 1
10% of stationery in Box T = 10 x 1 = 10
Number of post-it pads in Box U = 10
Answer(s): (a) 40%; (b)
110; (c) 10