PSLELinda had a collection of stamps from Greece, Russia and Turkey. She had 196 stamps from Greece. 40% of her stamps were from Russia. She had 36 fewer stamps from Turkey than from Russia.
- What was the total number of stamps in Linda's collection?
- Linda's aunt gave her some stamps from Russia. Her total collection increased by 20%. What percentage of her collection was from Russia after that?
(a)
Greece |
Russia |
Turkey |
Total |
196 |
40% |
40% - 36 |
100% |
|
+ 20% |
|
+ 20% |
|
60% |
|
120% |
Total number of stamps
= 40% + 40% - 36 + 196
= 80% + 160
100% = 80% + 160
100% - 80% = 160
20% = 160
1% = 160 ÷ 20 = 8
Total number of stamps in Linda's collection
= 100%
= 100 x 8
= 800
(b)
Old stamp collection = 100%
New stamp collection = 100% + 20% = 120%
Percentage of stamps from Russia
= 40% + 20%
= 60%
Percentage of her collection from Russia
=
60120 x 100%
= 50%
Answer(s): (a) 800; (b) 50%