PSLEXuan had a collection of stamps from Russia, Pakistan and India. She had 130 stamps from Russia. 30% of her stamps were from Pakistan. She had 50 fewer stamps from India than from Pakistan.
- What was the total number of stamps in Xuan's collection?
- Xuan's aunt gave her some stamps from Pakistan. Her total collection increased by 25%. What percentage of her collection was from Pakistan after that?
(a)
Russia |
Pakistan |
India |
Total |
130 |
30% |
30% - 50 |
100% |
|
+ 25% |
|
+ 25% |
|
55% |
|
125% |
Total number of stamps
= 30% + 30% - 50 + 130
= 60% + 80
100% = 60% + 80
100% - 60% = 80
40% = 80
1% = 80 ÷ 40 = 2
Total number of stamps in Xuan's collection
= 100%
= 100 x 2
= 200
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Pakistan
= 30% + 25%
= 55%
Percentage of her collection from Pakistan
=
55125 x 100%
= 44%
Answer(s): (a) 200; (b) 44%