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From 2008 to 2009, the sales of a book decreased by 80%. If the sales in 2010 were the same as in 2008, by what percent did it increase from 2009 to 2010?

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Important Questions on Percentage

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Anand spends 75% of his income. His income is increased by 20% and he increased his expenditure by 10%. His savings are increased by ______.
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In an examination, 35% candidates failed in one subject and 42% failed in another subject, while 15% failed in both the subjects. If 2500 candidates appeared at the examination, how many passed either subject but not in both?
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In the election between two candidates, a candidate who got 40% of total votes is defeated by 15000 votes. The number of votes received by the winning candidates is_____.
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The price of sugar increases by 20%. By what per cent must a housewife reduce the consumption of sugar, so that the expenditure on sugar is the same as before?
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The salary of an employee of a company increases every month by 4%. If his salary in August was Rs. 6300, what would be his approximate salary in month of October of the same year?
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Bina’s monthly income is 90% of Anita’s monthly income. The total of both their monthly incomes is equal to Mr Sen’s monthly income. Mr.Sen annual income is Rs. 775200. What is Bina’s monthly income?
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In a test, Rajesh got 112 marks which was 32 more than the passing marks. Sonal got 75% marks which was 70 more than the passing marks. What is the minimum passing percentage of the test?
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Anish spends 25% of his salary on house rent, 5% on food, 15% on travel, 10% on clothes and the remaining amount of 22500 is saved. What is Anish’s salary?