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%