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Percents, Decimals, and Fractions. Textbook page 422 IAN pages 92 & 94. How can we write decimals as percents?. To write decimals as percents … Use the place value to write it as a fraction, and change it to a fraction over 100 OR (2) Move the decimal right two places.
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Percents, Decimals, and Fractions Textbook page 422 IAN pages 92 & 94
How can we write decimals as percents? To write decimals as percents … • Use the place value to write it as a fraction, and change it to a fraction over 100 OR (2) Move the decimal right two places.
Example 1:Write each decimal as a percent.(method #1) Writing Decimals as Percents • 0.3 3 is in the tenths place 0.3 = 3 = 30 = 30% 10 100 (B) 0.43 the 3 is in the hundredths place 0.43 = 43 = 43% 100
Example 1:Write each decimal as a percent.(method #2) Writing Decimals as Percents (C) 0.7431 move the decimal two places right 0.7431 = 74.31% (D) 0.023 move the decimal two places right 0.023 = 2.3%
How can we write fractions as percents? To write fractions as percents … • Set it equal to a fraction with a denominator of 100 OR (2) divide
Example 2:Write each fraction as a percent. Writing Fractions as Percents • 4/5 4 .20 = 80 = 80% 5 . 20 100 (B) 3/8 .375 = 37.5%
Example 3:About 39/50 of Earth’s atmosphere is made up of nitrogen. About what percent of the atmosphere is nitrogen? Earth Science Application 39 .2 = 78 = 78% 50 . 2 100 *OR* = 78%
