PSLEMarion had a collection of stamps from Brunei, Russia and England. She had 191 stamps from Brunei. 30% of her stamps were from Russia. She had 31 fewer stamps from England than from Russia.
- What was the total number of stamps in Marion's collection?
- Marion's aunt gave her some stamps from Russia. Her total collection increased by 25%. What percentage of her collection was from Russia after that?
(a)
Brunei |
Russia |
England |
Total |
191 |
30% |
30% - 31 |
100% |
|
+ 25% |
|
+ 25% |
|
55% |
|
125% |
Total number of stamps
= 30% + 30% - 31 + 191
= 60% + 160
100% = 60% + 160
100% - 60% = 160
40% = 160
1% = 160 ÷ 40 = 4
Total number of stamps in Marion's collection
= 100%
= 100 x 4
= 400
(b)
Old stamp collection = 100%
New stamp collection = 100% + 25% = 125%
Percentage of stamps from Russia
= 30% + 25%
= 55%
Percentage of her collection from Russia
=
55125 x 100%
= 44%
Answer(s): (a) 400; (b) 44%