PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, H and J. The total number of stationery in Box H is four times the total number of stationery in Box J.
- Find the percentage of highlighters in Box H.
- What fraction of stationery in Box J is highlighters?
- The number of highlighters in Box H is 140. Find the number of highlighters in Box J.
(a)
90°360° = 25% of stationery in Box H
Percentage of glues in Box H = 25%
Percentage of highlighters in Box H
= 100% - 40% - 25%
= 35%
(b)
Percentage of highlighters in Box J
= 100% - 60% - 30%
= 10%
Fraction of stationery in Box J that is highlighters
= 10100
=
110 (c)
35% of stationery in Box H = 140
1% of stationery in Box H = 140 ÷ 35 = 4
100% of the stationery in Box H = 100 x 4 = 400
Number of stationery in Box J
= 400 ÷ 4
= 100
100% of stationery in Box J = 100
1% of stationery in Box H = 100 ÷ 100 = 1
10% of stationery in Box H = 10 x 1 = 10
Number of highlighters in Box J = 10
Answer(s): (a) 35%; (b)
110; (c) 10