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Date: ___________ Math 9/9H. Fractions, Decimals, and Percents 1. Fraction to Decimal: divide top number by bottom number Eg: 3 = 0.75 6 = 0.6 145 =0.36 4 10 404 (0.35891….)
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Date: ___________ Math 9/9H Fractions, Decimals, and Percents 1. Fraction to Decimal: divide top number by bottom number Eg: 3 = 0.75 6 = 0.6 145 =0.36 4 10 404 (0.35891….) 2. Decimal to Fraction: write the decimal number as the numerator, choose the denominator, and reduce to lowest terms Eg: 0.75 -> 75 -> 3 0.355 -> 355 -> 71 100 4 1000 200
Date: ___________ Math 9/9H “Percent” means “out of 100” or 0.01 or 1 100 3. Writing percents as decimals: • E.g.: 15% move the decimal two places LEFT (if no decimal is shown, it is right of the last digit) 0.15 remove the percent sign 4. Writing decimals as percents: • E.g.: 0.24 move the decimal two places RIGHT (if no decimal is shown, it is right of the last digit) 24% write the percent sign
Date: ___________ Math 9/9H 5. Writing percents as fractions: • E.g.: 38% write the percent as a fraction over 100 38 write this fraction in LOWEST TERMS 100 19 (find the biggest number that goes 50 evenly into the top and bottom) 6. Writing fractions as percents • E.g.: 32 write the fraction as a decimal by using 45 your calculator to divide TOP number by BOTTOM number = 0. 7111 move the decimal two places RIGHT = 71.11 % and write the percent sign
