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Percents, Fractions, and Decimals. Vocabulary. A percent is a ratio that compares a number to 100. It means “per 100.” 49 out of 100 is 49%. Writing Percents as Decimals.
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Vocabulary • A percent is a ratio that compares a number to 100. It means “per 100.” • 49 out of 100 is 49%.
Writing Percents as Decimals • Imagine a decimal point in the place of the percent sign, and move the decimal two spaces to the left (the same as dividing by 100). .26 26% 40% .40 .4 .07 7%
Writing Percents as Fractions • Place the percent in a fraction with a denominator of 100. • Simplify the fraction. 26% 26 13 100 50 75 3 75% 100 4
Writing Decimals as Percents • Move the decimal point two spaces to the right, and add a % symbol (this is the same as multiplying by 100). 34% 1 100% .34 19% .19 .125 12.5% 60% .6
Writing Fractions as Percents • Divide the numerator by the denominator to get a decimal. • Change the decimal to a percent by moving the decimal point to the right (multiply by 100). 6 0.24 24% 25