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Questions and Answers
A store offers a 25% discount on a product originally priced at $80. After the discount, a 8% sales tax is applied. What is the final price a customer pays for the product?
A store offers a 25% discount on a product originally priced at $80. After the discount, a 8% sales tax is applied. What is the final price a customer pays for the product?
- $65.00
- $64.80 (correct)
- $66.00
- $65.50
An item's price increased from $25 to $30. What is the percentage increase in the item's price?
An item's price increased from $25 to $30. What is the percentage increase in the item's price?
- 15%
- 16.7%
- 20% (correct)
- 25%
If a retailer sells a product for $75 after applying a 20% discount, what was the original price of the product before the discount?
If a retailer sells a product for $75 after applying a 20% discount, what was the original price of the product before the discount?
- $93.75 (correct)
- $90
- $60
- $85
What is 9/25 expressed as a decimal?
What is 9/25 expressed as a decimal?
If a company's revenue decreased from $500,000 to $425,000, what is the percentage decrease in revenue?
If a company's revenue decreased from $500,000 to $425,000, what is the percentage decrease in revenue?
Flashcards
Fraction to Decimal
Fraction to Decimal
Divide the numerator by the denominator.
Percentage to Fraction
Percentage to Fraction
Express the percentage as a fraction over 100, then simplify.
Percentage Increase
Percentage Increase
Multiply the original value by (1 + percentage increase as a decimal).
Percentage Decrease
Percentage Decrease
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Percentage Change Formula
Percentage Change Formula
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Study Notes
- Math Formulas
Fractions and Decimals
- Convert fractions to decimals by dividing the numerator by the denominator
- Convert decimals to percentages by multiplying by one hundred (%)
- Percentages are converted into fractions over one hundred, then simplify
Percentages
- To find 80% of 368, multiply 368 by 0.8, which equals 294.4
Percentage Increase
- As an example, to increase 125 by 20%, first calculate 100% + 20% = 120% = 1.2
- Then multiply 125 by 1.2, which equals 150
- You can also find the increase amount and then add to the original amount
Percentage Decrease
- As an example, to decrease 190 by 45%, first calculate 100% - 45% = 55% = 0.55
- Then multiply 190 by 0.55, which equals 104.50
- You can also find the decrease amount and then subtract from the original amount
Percentage Change
- The formula for percentage change is the (amount of change / original amount) * 100
- As an example, if the original = 11andthenew=11 and the new = 11andthenew=15, then 15-11=4
- Divide 4/11 = 0.364
- Multiple 0.364 * 100 = 36.4%
Reverse Percentages
- If X - 20% = 24.5, then 100% - 20% = 80% or 0.8
- Divide 24.5 / 0.8 = 30.625
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Description
Learn how to perform conversions between fractions, decimals, and percentages. Explore how to calculate percentage increases and decreases. Understand the formula for calculating percentage change with practical examples.
