Percentage

Feb 3rd, 2012
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Percentage: Definition and examples. How to express percentages. Types of problems involving percentages. Real world problems involving percentages (tips, discounts and sale prices, taxes, etc)

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PercentagesPercent means parts per 100, so it tells you a ratio "out of 100". The symbol is %.Ex: 30% means 30 per 100You can express a percent as a decimal or as a fraction:Example: 30% = 30/100 = 0.3Types of percentage problemsamount = rate * base1) Finding the amountEx: What is 20% of 600?Rate = 20% = 20/100 = 0.2Base = 600Amount = 0.2*600 = 120Notes:If the rate is less than 100%, the amount will be less than the base.If the rate is greater than 100%, the amount will be greater than the base.If the rate is equal to 50%, the amount will be half of the base.If the rate is equa

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