Aptitude · all questions

Percentage
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Q441

If the price of a book is first decreased by 25% and then increased by 20%, then the net charges in the price will be :

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Q442

The current birth rate per thousand is 32, whereas the corresponding death rate is 11 per thousand. The net growth rate in terms of population increase in percent is given by :

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Q443

A reduction of 21% in the price of wheat enables a person to buy 10.5 kg more for Rs. 100. What is the reduced price per kg ?

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Q444

If X is 90% of Y, then what percent of X is Y ?

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Q445

30% apples out of 450 are rotten, How many apples are in good condition ?

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Q446

Find the value :
3.2% of 500 × 2.4% of ? = 288

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Q447

76% of the students in a school are boys. If the number of girls is 204, then the total number of students is :

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Q448

1100 boys and 700 girls are examined in a test; 42% of the boys and 30% of the girls pass. The percentage of the total who failed is :

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Q449

If a number is reduced by 40% it becomes two-thirds of another number. What is the ratio of the first number to the second number ?

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Q450

In a mixture of milk and water, the proportion of water by weight was 75%. If in the 60 gm mixture 15 gm of water was added, what would be the percentage of water ?

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Q451

If a = b ×

\frac{d}{c}

; b, c and d are increased by 10%, then by how much does a increase ?

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Q452

Kamal has 160 toffees. He gave 5% toffees to Ravi, 15% toffees to Anita and one-fourth of the toffees to Gagan. How many toffees are left with Kamal after the distribution ?

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Q453

If a is 60% of b, then what percent of 4a is 5b ?

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Q454

Solve this :
(0.85% of 405) + (2.25% of 550) = ?

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Q455

An alloy of gold and silver weight 50 g. It contains 80% gold. How much gold should be added to the alloy so that percentage of gold is increased to 90 ?

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Q456

One-eighth of a number is 41.5. What will 69% of that number be ?

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Q457

A company pays rent of Rs. 25000 per month for office space to its owner. But if the company pays the annual rent at the beginning of the year the owner gives a discount of 5% on the total annual rent. What is the annual amount the company pays to the owner after the discount ?

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Q458

Solve this :
(0.56% of 225) × (3.25% of 430) = ?

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Q459

An interval of 3 hours 40 minutes is wrongly estimated as 3 hours 45.5 minutes. The error percentage is :

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Q460

A number increased by

37 \frac{1}{2}

% gives 33. The number is :

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