PSLEThe pie charts show the number of each type of stationery in 2 stationery boxes, Q and R. The total number of stationery in Box Q is twice the total number of stationery in Box R.
- Find the percentage of post-it pads in Box Q.
- What fraction of stationery in Box R is post-it pads?
- The number of post-it pads in Box Q is 160. Find the number of post-it pads in Box R.
(a)
90°360° = 25% of stationery in Box Q
Percentage of markers in Box Q = 25%
Percentage of post-it pads in Box Q
= 100% - 55% - 25%
= 20%
(b)
Percentage of post-it pads in Box R
= 100% - 40% - 25%
= 35%
Fraction of stationery in Box R that is post-it pads
= 35100
=
720 (c)
20% of stationery in Box Q = 160
1% of stationery in Box Q = 160 ÷ 20 = 8
100% of the stationery in Box Q = 100 x 8 = 800
Number of stationery in Box R
= 800 ÷ 2
= 400
100% of stationery in Box R = 400
1% of stationery in Box Q = 400 ÷ 100 = 4
35% of stationery in Box Q = 35 x 4 = 140
Number of post-it pads in Box R = 140
Answer(s): (a) 20%; (b)
720; (c) 140