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 pens in Box T.
- What fraction of stationery in Box U is pens?
- The number of pens in Box T is 180. Find the number of pens in Box U.
(a)
90°360° = 25% of stationery in Box T
Percentage of notebooks in Box T = 25%
Percentage of pens in Box T
= 100% - 45% - 25%
= 30%
(b)
Percentage of pens in Box U
= 100% - 35% - 30%
= 35%
Fraction of stationery in Box U that is pens
= 35100
=
720 (c)
30% of stationery in Box T = 180
1% of stationery in Box T = 180 ÷ 30 = 6
100% of the stationery in Box T = 100 x 6 = 600
Number of stationery in Box U
= 600 ÷ 2
= 300
100% of stationery in Box U = 300
1% of stationery in Box T = 300 ÷ 100 = 3
35% of stationery in Box T = 35 x 3 = 105
Number of pens in Box U = 105
Answer(s): (a) 30%; (b)
720; (c) 105