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 thrice the total number of stationery in Box U.
- Find the percentage of highlighters in Box T.
- What fraction of stationery in Box U is highlighters?
- The number of highlighters in Box T is 180. Find the number of highlighters in Box U.
(a)
90°360° = 25% of stationery in Box T
Percentage of files in Box T = 25%
Percentage of highlighters in Box T
= 100% - 55% - 25%
= 20%
(b)
Percentage of highlighters in Box U
= 100% - 70% - 20%
= 10%
Fraction of stationery in Box U that is highlighters
= 10100
=
110 (c)
20% of stationery in Box T = 180
1% of stationery in Box T = 180 ÷ 20 = 9
100% of the stationery in Box T = 100 x 9 = 900
Number of stationery in Box U
= 900 ÷ 3
= 300
100% of stationery in Box U = 300
1% of stationery in Box T = 300 ÷ 100 = 3
10% of stationery in Box T = 10 x 3 = 30
Number of highlighters in Box U = 30
Answer(s): (a) 20%; (b)
110; (c) 30