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Percentage: During the years 1980 to 1985
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13 Sep 2014, 23:27
13 Sep 2014, 23:27
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During the years 1980 to 1985, 10% of the population of a city migrated to another city in search of green pastures. The percentage of migrated people from 1980 to 1990 was recorded as 20%. What is the percentage of migrated people during the years 1985 to 1990?
a.\(\frac{100}{11} %\)
b.\(10 %\)
c. \(\frac{100}{9} %\)
d. \(18 %\)
e. \(\frac{100}{3} %\)
a.\(\frac{100}{11} %\)
b.\(10 %\)
c. \(\frac{100}{9} %\)
d. \(18 %\)
e. \(\frac{100}{3} %\)
Re: Percentage: During the years 1980 to 1985
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13 Sep 2014, 23:46
13 Sep 2014, 23:46
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Lets say there are 100 people in the city.
So we have
1980-----------100
1985----------- 90
1990-----------80
% change from 85 to 90 (10/90)*100. Hence C.
So we have
1980-----------100
1985----------- 90
1990-----------80
% change from 85 to 90 (10/90)*100. Hence C.
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Percentage: During the years 1980 to 1985
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13 Feb 2021, 04:38
13 Feb 2021, 04:38
1
Let us assume that the population of city in 1980 was 100 people
Now, 10% of people migrated from 1980 - 1985 i.e. 10 people
Population left at the end of 1985 = 90 people
It has been given that during 1980 - 1990, 20% of people migrated i.e. 20 people
So by the end of 1990, left population must be 80
We can see that 10 people migrated from 1985 - 1990
\(Percent change = \frac{10}{90}\) x 100 = \(\frac{100}{9}\)
Hence, option C
Now, 10% of people migrated from 1980 - 1985 i.e. 10 people
Population left at the end of 1985 = 90 people
It has been given that during 1980 - 1990, 20% of people migrated i.e. 20 people
So by the end of 1990, left population must be 80
We can see that 10 people migrated from 1985 - 1990
\(Percent change = \frac{10}{90}\) x 100 = \(\frac{100}{9}\)
Hence, option C
