PSLEPamela had a collection of stamps from Iraq, Ireland and Haiti. She had 153 stamps from Iraq. 40% of her stamps were from Ireland. She had 13 fewer stamps from Haiti than from Ireland.
- What was the total number of stamps in Pamela's collection?
- Pamela'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)
Iraq |
Ireland |
Haiti |
Total |
153 |
40% |
40% - 13 |
100% |
|
+ 25% |
|
+ 25% |
|
65% |
|
125% |
Total number of stamps
= 40% + 40% - 13 + 153
= 80% + 140
100% = 80% + 140
100% - 80% = 140
20% = 140
1% = 140 ÷ 20 = 7
Total number of stamps in Pamela's collection
= 100%
= 100 x 7
= 700
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Ireland
= 40% + 25%
= 65%
Percentage of her collection from Ireland
=
65125 x 100%
= 52%
Answer(s): (a) 700; (b) 52%