PSLEAbi had a collection of stamps from Malta, Iraq and Brunei. She had 110 stamps from Malta. 40% of her stamps were from Iraq. She had 50 fewer stamps from Brunei than from Iraq.
- What was the total number of stamps in Abi's collection?
- Abi's aunt gave her some stamps from Iraq. Her total collection increased by 20%. What percentage of her collection was from Iraq after that?
(a)
Malta |
Iraq |
Brunei |
Total |
110 |
40% |
40% - 50 |
100% |
|
+ 20% |
|
+ 20% |
|
60% |
|
120% |
Total number of stamps
= 40% + 40% - 50 + 110
= 80% + 60
100% = 80% + 60
100% - 80% = 60
20% = 60
1% = 60 ÷ 20 = 3
Total number of stamps in Abi's collection
= 100%
= 100 x 3
= 300
(b)
Old stamp collection = 100%
New stamp collection = 100% + 20% = 120%
Percentage of stamps from Iraq
= 40% + 20%
= 60%
Percentage of her collection from Iraq
=
60120 x 100%
= 50%
Answer(s): (a) 300; (b) 50%