PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, K and L. The total number of stationery in Box K is twice the total number of stationery in Box L.
- Find the percentage of glues in Box K.
- What fraction of stationery in Box L is glues?
- The number of glues in Box K is 90. Find the number of glues in Box L.
(a)
90°360° = 25% of stationery in Box K
Percentage of rulers in Box K = 25%
Percentage of glues in Box K
= 100% - 30% - 25%
= 45%
(b)
Percentage of glues in Box L
= 100% - 40% - 30%
= 30%
Fraction of stationery in Box L that is glues
= 30100
=
310 (c)
45% of stationery in Box K = 90
1% of stationery in Box K = 90 ÷ 45 = 2
100% of the stationery in Box K = 100 x 2 = 200
Number of stationery in Box L
= 200 ÷ 2
= 100
100% of stationery in Box L = 100
1% of stationery in Box K = 100 ÷ 100 = 1
30% of stationery in Box K = 30 x 1 = 30
Number of glues in Box L = 30
Answer(s): (a) 45%; (b)
310; (c) 30