PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, G and H. The total number of stationery in Box G is four times the total number of stationery in Box H.
- Find the percentage of pencils in Box G.
- What fraction of stationery in Box H is pencils?
- The number of pencils in Box G is 140. Find the number of pencils in Box H.
(a)
90°360° = 25% of stationery in Box G
Percentage of staplers in Box G = 25%
Percentage of pencils in Box G
= 100% - 40% - 25%
= 35%
(b)
Percentage of pencils in Box H
= 100% - 45% - 25%
= 30%
Fraction of stationery in Box H that is pencils
= 30100
=
310 (c)
35% of stationery in Box G = 140
1% of stationery in Box G = 140 ÷ 35 = 4
100% of the stationery in Box G = 100 x 4 = 400
Number of stationery in Box H
= 400 ÷ 4
= 100
100% of stationery in Box H = 100
1% of stationery in Box G = 100 ÷ 100 = 1
30% of stationery in Box G = 30 x 1 = 30
Number of pencils in Box H = 30
Answer(s): (a) 35%; (b)
310; (c) 30