PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, Y and Z. The total number of stationery in Box Y is twice the total number of stationery in Box Z.
- Find the percentage of staplers in Box Y.
- What fraction of stationery in Box Z is staplers?
- The number of staplers in Box Y is 280. Find the number of staplers in Box Z.
(a)
90°360° = 25% of stationery in Box Y
Percentage of pens in Box Y = 25%
Percentage of staplers in Box Y
= 100% - 40% - 25%
= 35%
(b)
Percentage of staplers in Box Z
= 100% - 60% - 20%
= 20%
Fraction of stationery in Box Z that is staplers
= 20100
=
15 (c)
35% of stationery in Box Y = 280
1% of stationery in Box Y = 280 ÷ 35 = 8
100% of the stationery in Box Y = 100 x 8 = 800
Number of stationery in Box Z
= 800 ÷ 2
= 400
100% of stationery in Box Z = 400
1% of stationery in Box Y = 400 ÷ 100 = 4
20% of stationery in Box Y = 20 x 4 = 80
Number of staplers in Box Z = 80
Answer(s): (a) 35%; (b)
15; (c) 80