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Questions and Answers
What is 25% expressed as a fraction?
What is 25% expressed as a fraction?
- 1/4 (correct)
- 1/3
- 3/8
- 2/5
If you scored 18 out of 60 on a test, what percentage did you achieve?
If you scored 18 out of 60 on a test, what percentage did you achieve?
- 35%
- 25%
- 40%
- 30% (correct)
A store is offering a 15% discount on a jacket that costs $80. What will be the final price of the jacket after the discount?
A store is offering a 15% discount on a jacket that costs $80. What will be the final price of the jacket after the discount?
- $76
- $68 (correct)
- $66
- $70
Which of the following ratios represents a 60% success rate in an event where 500 trials were conducted?
Which of the following ratios represents a 60% success rate in an event where 500 trials were conducted?
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If a car's value decreases by 20% after one year and it originally cost $25,000, what will be its value after one year?
If a car's value decreases by 20% after one year and it originally cost $25,000, what will be its value after one year?
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Study Notes
Expressing Percentages as Fractions
- 25% is equivalent to the fraction 1/4.
Calculating Percentages
- A score of 18 out of 60 represents a 30% success rate.
- This is calculated by dividing the score (18) by the total marks (60) and multiplying the result by 100.
Discounts and Final Prices
- A 15% discount on a $80 jacket equates to a $12 discount.
- The discount amount is calculated by multiplying the original price ($80) by the discount percentage (15%).
- The final price of the jacket after the discount is $68.
- This is calculated by subtracting the discount amount ($12) from the original price ($80).
Representing Success Rates
- A 60% success rate in 500 trials can be represented by the ratio 300:500.
- This ratio implies that 300 trials out of 500 were successful.
Calculating Value Depreciation
- A 20% decrease in the value of a $25,000 car equates to a $5,000 depreciation.
- This is calculated by multiplying the original price ($25,000) by the depreciation percentage (20%).
- The car's value after one year will be $20,000.
- This is calculated by subtracting the depreciation amount ($5,000) from the original price ($25,000).
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