6-1 Relating Fractions, Decimals, and Percents Warm Up Evaluate –  or

6-1 Relating Fractions, Decimals, and Percents Vocabulary percent

6-1 Relating Fractions, Decimals, and Percents Percents are ratios that compare a number to 100. RatioDecimalPercent 30% 50% 75% = = =

6-1 Relating Fractions, Decimals, and Percents Think of the % symbol as meaning per 100 or / % = 75/100 = 0.75 Reading Math

6-1 Relating Fractions, Decimals, and Percents To convert a fraction to a decimal, divide the numerator by the denominator. 1 8 = 1 ÷ 8 = To convert a decimal to a percent, multiply by 100 and insert the percent symbol  100  12.5%

6-1 Relating Fractions, Decimals, and Percents Find the missing fraction or percent equivalent for each letter a–g on the number line. Additional Example 1: Finding Equivalent Fractions and Percents 1 10 a:a:10% = =

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued b:b:0.25 = 1 4 = 25% Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued c:c:40% = = = Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued d:d:0.60 = 3 5 = 60% Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued e:e: 2 3 % = = 2 3 Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued f:f: 1 2 % = = = Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Additional Example 1 Continued g:g:125% = = 5 4 = Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 a:a: 1 2 % = = = c ab e d 50%12 % f g % % 1 Find the missing fraction or percent equivalent for each letter a–g on the number line.

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued b:b:25% = = 1 4 Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued c:0.375 = 3 8 = 37 % 1 2 Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued d:d:50% = = 1 2 Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued e:e:0.625 = 5 8 = 62 % 1 2 Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued f:f:75% = = 3 4 Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 1 Continued g:g:1 = 100 = 100% Find the missing fraction or percent equivalent for each letter a–g on the number line. c ab e d 50%12 % f g % % 1

6-1 Relating Fractions, Decimals, and Percents Additional Example 2A: Comparing Fractions, Decimals, and Percents Compare. Write, or =. 40% = 0.25 = 25% 25% < 40% Write as a percent. Compare < 40% When multiplying a decimal by 100, simply move the decimal point two spaces to the right. Remember!

6-1 Relating Fractions, Decimals, and Percents Additional Example 2B: Comparing Fractions, Decimals, and Percents Compare. Write, or = % = 89.3% 89.3% > 50% Write as a percent. Compare > 50%

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 2A Compare. Write, or =. 65% = 0.75 = 75% 75% > 65% Write as a percent. Compare > 65%

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 2B Compare. Write, or = % = 13.6% 13.6% < 20% Write as a percent. Compare < 20%

6-1 Relating Fractions, Decimals, and Percents Additional Example 3: Ordering Fractions, Decimals, and Percents Write 0.075%,, 0.41, and 100% in order from least to greatest = 0.75 = 75% 0.41 = 41% Write the numbers in the same form. Compare % < 41% < 75% < 100% 0.075%, 0.41,, 100%

6-1 Relating Fractions, Decimals, and Percents Check It Out! Example 3 Write 35%, 0.25,, and 200% in order from least to greatest = 0.50 = 50% 0.25 = 25% Write the numbers in the same form. Compare % < 35% < 50% < 200% 0.25, 35%,, 200%

6-1 Relating Fractions, Decimals, and Percents Gold that is 24 karat is 100% pure gold. Gold that is 14 karat is 14 parts pure gold and 10 parts another metal. What percent of 14 karat gold is pure gold? Additional Example 4: Physical Science Application Set up a ratio and simplify. parts pure gold total parts = 7 = 7  12 = Find the percent = 58.3% 1 3 So 14-karat gold is 58.3%, or 58 % pure gold.

6-1 Relating Fractions, Decimals, and Percents A baker ’ s dozen is 13. When a shopper purchases a dozen items at the bakery they get 12. It is said that the baker eats 1 item from every batch. What percent of the food does the baker eat? Check It Out! Example 4 Set up a ratio and simplify. items eaten total items = 1  13  Find the percent  7.7% The baker eats about 7.7% of the items they bake.

6-1 Relating Fractions, Decimals, and Percents Lesson Review: Part I Find each equivalent value. 1. as a percent 2. 20% as a fraction 3. as a decimal Compare. Write, or = % % < 37.5% >

6-1 Relating Fractions, Decimals, and Percents Lesson Review: Part II 6. Write 245%,, 0.133, and 66.6% in order from least to greatest. 5. About 342,000 km 2 of Greenland ’ s total area (2,175,000 km 2 ) is not covered with ice. To the nearest percent, what percent of Greenland ’ s total area is not covered with ice? 16% 0.133,, 66.6%, 245%