PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, R and S. The total number of stationery in Box R is twice the total number of stationery in Box S.
- Find the percentage of correction tapes in Box R.
- What fraction of stationery in Box S is correction tapes?
- The number of correction tapes in Box R is 280. Find the number of correction tapes in Box S.
(a)
90°360° = 25% of stationery in Box R
Percentage of glues in Box R = 25%
Percentage of correction tapes in Box R
= 100% - 40% - 25%
= 35%
(b)
Percentage of correction tapes in Box S
= 100% - 55% - 15%
= 30%
Fraction of stationery in Box S that is correction tapes
= 30100
=
310 (c)
35% of stationery in Box R = 280
1% of stationery in Box R = 280 ÷ 35 = 8
100% of the stationery in Box R = 100 x 8 = 800
Number of stationery in Box S
= 800 ÷ 2
= 400
100% of stationery in Box S = 400
1% of stationery in Box R = 400 ÷ 100 = 4
30% of stationery in Box R = 30 x 4 = 120
Number of correction tapes in Box S = 120
Answer(s): (a) 35%; (b)
310; (c) 120