PSLEMary had a collection of stamps from Peru, Malaysia and Oman. She had 151 stamps from Peru. 40% of her stamps were from Malaysia. She had 11 fewer stamps from Oman than from Malaysia.
- What was the total number of stamps in Mary's collection?
- Mary's aunt gave her some stamps from Malaysia. Her total collection increased by 25%. What percentage of her collection was from Malaysia after that?
(a)
Peru |
Malaysia |
Oman |
Total |
151 |
40% |
40% - 11 |
100% |
|
+ 25% |
|
+ 25% |
|
65% |
|
125% |
Total number of stamps
= 40% + 40% - 11 + 151
= 80% + 140
100% = 80% + 140
100% - 80% = 140
20% = 140
1% = 140 ÷ 20 = 7
Total number of stamps in Mary's collection
= 100%
= 100 x 7
= 700
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Malaysia
= 40% + 25%
= 65%
Percentage of her collection from Malaysia
=
65125 x 100%
= 52%
Answer(s): (a) 700; (b) 52%