# Percentage

1. | If 25% of x = y, then y% of 40 is same as : |
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A. 25% of x

B. 20% of x

C. 5% of x

D. 10% of x

View Answer Discuss Work SpaceAnswer: option d

Explanation:

25% of x = y

=> (25/100) * x = y

y% of 40 =(y/100) x 40

= [(25x/100) / 100] x 40

= 10x/100 = 10% of x

2. | The value of a motor depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 5832, its purchase price was : |
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A. 10000

B. 8000

C. 12000

D. 8500

View Answer Discuss Work SpaceAnswer: option b

Explanation:

Purchase price = Rs. 5832(1−10/100)^3

= Rs. [5832 * (10/9) * (10/9 )* (10/9)]

= Rs.8000

3. | If the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be: |
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A. 10

B. 20

C. 30

D. 40

View Answer Discuss Work SpaceAnswer: option a

Explanation:

Let the original price be 100.

New final price = 120 % of (75 % of 100)

= [(120/100) * (75/100) * 100]

= 90

Hence, Decrease = 10%

4. | If A's height is 40% less than that of B, how much percent B's height is more than that of A? |
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A. 76.67%

B. 83.67%

C. 66.67%

D. 86.66%

View Answer Discuss Work SpaceAnswer: option c

Explanation:

If B's height is 100, then A's height is 60.

Excess of B's height over A's = (100 - 60) = 40

In % = (40/60)*100 = 66.67%

5. | What percent of 6.4 kg is 16 gms ? |
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A. .25%

B. .5%

C. .75%

D. 1%

View Answer Discuss Work SpaceAnswer: option a

Explanation:

Required percentage = (16/6400 * 100)% = 1/4% = 0.25%