PSLE
The pie charts show the number of each type of stationery in 2 stationery boxes, T and U. The total number of stationery in Box T is four times the total number of stationery in Box U.

1. Find the percentage of markers in Box T.
2. What fraction of stationery in Box U is markers?
3. The number of markers in Box T is 180. Find the number of markers in Box U.

(a)
^90°_360° = 25% of stationery in Box T

Percentage of rulers in Box T = 25%

Percentage of markers in Box T
= 100% - 30% - 25%
= 45%

(b)
Percentage of markers in Box U
= 100% - 70% - 15%
= 15%

Fraction of stationery in Box U that is markers
= ³₂₀

(c)
45% of stationery in Box T = 180
1% of stationery in Box T = 180 ÷ 45 = 4 
100% of the stationery in Box T = 100 x 4 = 400

Number of stationery in Box U
= 400 ÷ 4
= 100

100% of stationery in Box U = 100
1% of stationery in Box T = 100 ÷ 100 = 1
15% of stationery in Box T = 15 x 1 = 15  

Number of markers in Box U = 15

Answer(s): (a) 45%; (b) ³₂₀; (c) 15