PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, C and D. The total number of stationery in Box C is thrice the total number of stationery in Box D.
- Find the percentage of highlighters in Box C.
- What fraction of stationery in Box D is highlighters?
- The number of highlighters in Box C is 180. Find the number of highlighters in Box D.
(a)
90°360° = 25% of stationery in Box C
Percentage of staplers in Box C = 25%
Percentage of highlighters in Box C
= 100% - 55% - 25%
= 20%
(b)
Percentage of highlighters in Box D
= 100% - 60% - 20%
= 20%
Fraction of stationery in Box D that is highlighters
= 20100
=
15 (c)
20% of stationery in Box C = 180
1% of stationery in Box C = 180 ÷ 20 = 9
100% of the stationery in Box C = 100 x 9 = 900
Number of stationery in Box D
= 900 ÷ 3
= 300
100% of stationery in Box D = 300
1% of stationery in Box C = 300 ÷ 100 = 3
20% of stationery in Box C = 20 x 3 = 60
Number of highlighters in Box D = 60
Answer(s): (a) 20%; (b)
15; (c) 60