Converting Fractions, Decimals, and Percent

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Presentation transcript:

Converting Fractions, Decimals, and Percent March 31, 2011

Conversions Agenda Fractions Decimals Percent

You have 3 minutes to copy. Fractions to a Decimal Example 1: Divide the denominator (the bottom part) into the numerator (the top part): 1/4 = 1 ÷ 4 = 0.25 Example 2: The simplest method is to use your calculator and divide the denominator into the numerator. 5/8 in your calculator is 5 ÷ 8 = 0.625

You have 2 minutes to copy. You should memorize these fractions and decimals . ⅓ = 0.33 ¼ = 0.25 ½ = 0.50 ¾ = 0.75

Let’s Go!

Complete questions 1-5 on your worksheet. You can use your calculator. ✔For Understanding Complete questions 1-5 on your worksheet. You can use your calculator.

You have 2 minutes to copy. Starting from the decimal point, count the decimal places. If there is one decimal place, put the number over 10 and reduce. If there are two places, put the number over 100 and reduce. If there are three places, put it over 1000 and reduce, and so on. 0.25 = 25/100 = ¼ Don’t forget you have to reduce the fraction by finding the GCF. For example the factors of 25 are 1, 5, 25 and the factors of 100 are 1, 2, 4, 5, 10, 50, 25, 20, 100. The GCF is 25. Divide the bottom and top by 25 and you get ¼

Let’s Go!

Complete questions 6-8 on your worksheet. You can use your calculator. ✔For Understanding Complete questions 6-8 on your worksheet. You can use your calculator.

You have 5 minutes to copy. A decimal to a percent: Move the decimal point two places to the right. Then, attach a percent sign 0.25 = 25% A percent to a decimal: Move the decimal point two places to the left. Then, drop the percent sign. 25% = 0.25

Let’s Go!

Complete questions 9-12 on your worksheet. ✔For Understanding Complete questions 9-12 on your worksheet.

You have 3 minutes to copy. A percent to a fraction: Put the number over 100 and reduce. Then, drop the percent sign. 25% = 25/100 = 1/4

Let’s Go!

✔For Understanding Complete questions 12-15 on your worksheet. You can use your calculator. If you have extra time, please complete the chart on the back of the worksheet.