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 five times the total number of stationery in Box Z.
- Find the percentage of pencils in Box Y.
- What fraction of stationery in Box Z is pencils?
- The number of pencils in Box Y is 175. Find the number of pencils in Box Z.
(a)
90°360° = 25% of stationery in Box Y
Percentage of punchers in Box Y = 25%
Percentage of pencils in Box Y
= 100% - 40% - 25%
= 35%
(b)
Percentage of pencils in Box Z
= 100% - 65% - 15%
= 20%
Fraction of stationery in Box Z that is pencils
= 20100
=
15 (c)
35% of stationery in Box Y = 175
1% of stationery in Box Y = 175 ÷ 35 = 5
100% of the stationery in Box Y = 100 x 5 = 500
Number of stationery in Box Z
= 500 ÷ 5
= 100
100% of stationery in Box Z = 100
1% of stationery in Box Y = 100 ÷ 100 = 1
20% of stationery in Box Y = 20 x 1 = 20
Number of pencils in Box Z = 20
Answer(s): (a) 35%; (b)
15; (c) 20