PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, A and B. The total number of stationery in Box A is four times the total number of stationery in Box B.
- Find the percentage of highlighters in Box A.
- What fraction of stationery in Box B is highlighters?
- The number of highlighters in Box A is 160. Find the number of highlighters in Box B.
(a)
90°360° = 25% of stationery in Box A
Percentage of folders in Box A = 25%
Percentage of highlighters in Box A
= 100% - 35% - 25%
= 40%
(b)
Percentage of highlighters in Box B
= 100% - 65% - 20%
= 15%
Fraction of stationery in Box B that is highlighters
= 15100
=
320 (c)
40% of stationery in Box A = 160
1% of stationery in Box A = 160 ÷ 40 = 4
100% of the stationery in Box A = 100 x 4 = 400
Number of stationery in Box B
= 400 ÷ 4
= 100
100% of stationery in Box B = 100
1% of stationery in Box A = 100 ÷ 100 = 1
15% of stationery in Box A = 15 x 1 = 15
Number of highlighters in Box B = 15
Answer(s): (a) 40%; (b)
320; (c) 15