PSLEErika had a collection of stamps from Iran, Ireland and Jordan. She had 92 stamps from Iran. 30% of her stamps were from Ireland. She had 12 fewer stamps from Jordan than from Ireland.
- What was the total number of stamps in Erika's collection?
- Erika's aunt gave her some stamps from Ireland. Her total collection increased by 25%. What percentage of her collection was from Ireland after that?
(a)
Iran |
Ireland |
Jordan |
Total |
92 |
30% |
30% - 12 |
100% |
|
+ 25% |
|
+ 25% |
|
55% |
|
125% |
Total number of stamps
= 30% + 30% - 12 + 92
= 60% + 80
100% = 60% + 80
100% - 60% = 80
40% = 80
1% = 80 ÷ 40 = 2
Total number of stamps in Erika's collection
= 100%
= 100 x 2
= 200
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Ireland
= 30% + 25%
= 55%
Percentage of her collection from Ireland
=
55125 x 100%
= 44%
Answer(s): (a) 200; (b) 44%