PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, U and V. The total number of stationery in Box U is twice the total number of stationery in Box V.
- Find the percentage of foolscaps in Box U.
- What fraction of stationery in Box V is foolscaps?
- The number of foolscaps in Box U is 90. Find the number of foolscaps in Box V.
(a)
90°360° = 25% of stationery in Box U
Percentage of notebooks in Box U = 25%
Percentage of foolscaps in Box U
= 100% - 30% - 25%
= 45%
(b)
Percentage of foolscaps in Box V
= 100% - 60% - 20%
= 20%
Fraction of stationery in Box V that is foolscaps
= 20100
=
15 (c)
45% of stationery in Box U = 90
1% of stationery in Box U = 90 ÷ 45 = 2
100% of the stationery in Box U = 100 x 2 = 200
Number of stationery in Box V
= 200 ÷ 2
= 100
100% of stationery in Box V = 100
1% of stationery in Box U = 100 ÷ 100 = 1
20% of stationery in Box U = 20 x 1 = 20
Number of foolscaps in Box V = 20
Answer(s): (a) 45%; (b)
15; (c) 20