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Percent means "out of 100." We can use the percent symbol (%) as a handy way to write a fraction with a common denominator of 100. For example, instead of saying "8 out of every 100 professional basketball players are female," we can say "8% of professional basketball players are female."

A percent can always be written as a decimal, and a decimal can be written as a percent, by moving the decimal point two places to the right like this:

The grid below has 100 squares. Use the buttons to see different percents of the grid.

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 ·  Place value

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 ·  Estimating and

 ·  Adding / subtracting

 ·  Multiplying decimals

 ·  Dividing decimals

 ·  Percent

 ·  Exponents

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 ·  Signed integers

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    subtracting integers

 ·  Multiplying and
    dividing integers

 ·  Properties of integers

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