1. Create a common denominator 2. Add/subtract the numerators 3. Simplify
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How do you multiply fractions?
1. Multiply the denominator 2. Multiply the numerator
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How do you divide fractions?
1. Flip the first fraction upside-down 2. Multiply them
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How do you compare ratios?
By writing them as unit ratios
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What is a unit ratio?
Where one of the numbers is 1
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What is direct proportion?
When, as one quantity is multiplied by a number, n, so is the other
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What is simple interest?
When you multiply by the same amount of interest each year
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How do you calculate a percentage change?
percentage change = actual change / original amount x 100
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How do you write recurring decimals as fractions?
1. Call the recurring decimal n 2. Multiply the recurring decimal by 10 (/100 etc.) to shift the sequence to 10n 3. Subtract n from 10n (this makes all numbers after the decimal point 0) 4. This gives you 9n, so divide by 9 to solve the equation
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What is VAT?
Value Added Tax, charged at 20% on most goods and services
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What does depreciate mean?
It loses value
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Other cards in this set
Card 2
Front
How do you add/subtract fractions?
Back
1. Create a common denominator 2. Add/subtract the numerators 3. Simplify
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