PSLEJean had a collection of stamps from China, Zambia and Iraq. She had 97 stamps from China. 10% of her stamps were from Zambia. She had 17 fewer stamps from Iraq than from Zambia.
- What was the total number of stamps in Jean's collection?
- Jean's aunt gave her some stamps from Zambia. Her total collection increased by 25%. What percentage of her collection was from Zambia after that?
(a)
China |
Zambia |
Iraq |
Total |
97 |
10% |
10% - 17 |
100% |
|
+ 25% |
|
+ 25% |
|
35% |
|
125% |
Total number of stamps
= 10% + 10% - 17 + 97
= 20% + 80
100% = 20% + 80
100% - 20% = 80
80% = 80
1% = 80 ÷ 80 = 1
Total number of stamps in Jean's collection
= 100%
= 100 x 1
= 100
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Zambia
= 10% + 25%
= 35%
Percentage of her collection from Zambia
=
35125 x 100%
= 28%
Answer(s): (a) 100; (b) 28%