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Percentage
1. What is 20 % of 80 .
2. 42 is 3 % of what.
3. What percent of 65 is 130 .
4. 130 is what percent of 65 .
5. What is the percentage increase/decrease from 20 to 40 ?
6. A's annual income is increased/decreased from Rs 60000 to Rs 75000 . Find the percentage of increase in A's income.
7. In a school of 225 boys, 15 were absent then what percent were present ?
8. A earns 25 % more than B. By what percent does B earn less then A.
9. A reduction of 20 % in the price of basmati rice would enable a man to buy 2 kg of rice more for Rs 250 . Find the reduced pr ...
10. The price of tea has gone up by 20 %. By how much percent should its consumption be reduced so as not to increase the expendi ...
11. Find the selling price of an item, of which the printed price is Rs 25000 if the successive discounts given are 10 %, 8 % and ...
12. The successive discount of 10 % and 5 % are given on the purchased Computer. If the final price of the Computer is Rs 10260 , ...
Problem 10 of 12
10. The price of tea has gone up by
%. By how much percent should its consumption be reduced so as not to increase the expenditure?
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Percentage
10. The price of tea has gone up by 20 %. By how much percent should its consumption be reduced so as not to increase the expenditure?
Let price of tea be Rs `100` per kg
`:.` new price of tea = Rs `( 100 + 20 )` = Rs `120` per kg
Now not to increase the expenditure, its consumption must be reduced by Rs `20`
New Price Rs
Reduced Consumption Rs
120
20
100
?
Reduced Consumption = `(100 × 20) / 120 = 16.6667` Rs
`:.` Consumption must be reduced by Rs `16.6667` , if original price of tea be Rs `100`
`:.` Consumption must be reduced by `16.6667` % for not to increase the expenditure.
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