Whats a Percent

Finding a Percent of a Number Representing a Part of a Number as a Percent Percents Greater Than 100 Percents Less Than 1 

A percent is a number out of 100. We use the symbol % to represent the word percent. The value 36% is read as 36 percent and represents 36 out of 100. 

A PERCENT IS a ratio that represents a part-to-a-whole as a number out of 100. Fractions are used to represent a part-to-a-whole, but fractions can have many different denominators. A percent is like a fraction whose denominator is always 100. The relationship 50 out of 100 is written as 50%. The relationship 1 out of 2 can also be written as 50%. That is because the fraction is equal to Fractions and decimals can be written as percents, and vice versa, as we ll see in Chapter 11. 

28 of every 100 pizzas that Manny makes are pepperoni pizzas. What percent of Manny s pizzas are pepperoni pizzas  

28 out of 100 is 28%. If Manny made 100 pizzas, 28 of them would be pepperoni—but what if Manny made only 75 pizzas Before we can answer this question, we must learn how to write percents as decimals. 

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