PSLEIrene had a collection of stamps from Ireland, Pakistan and China. She had 199 stamps from Ireland. 40% of her stamps were from Pakistan. She had 19 fewer stamps from China than from Pakistan.
- What was the total number of stamps in Irene's collection?
- Irene'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)
Ireland |
Pakistan |
China |
Total |
199 |
40% |
40% - 19 |
100% |
|
+ 25% |
|
+ 25% |
|
65% |
|
125% |
Total number of stamps
= 40% + 40% - 19 + 199
= 80% + 180
100% = 80% + 180
100% - 80% = 180
20% = 180
1% = 180 ÷ 20 = 9
Total number of stamps in Irene's collection
= 100%
= 100 x 9
= 900
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Pakistan
= 40% + 25%
= 65%
Percentage of her collection from Pakistan
=
65125 x 100%
= 52%
Answer(s): (a) 900; (b) 52%