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 TOPICS This page:   fractions/percentages    Search   Dr. Math See also the Dr. Math FAQ:   fractions/decimals   percentages Internet Library:   fractions/decimals   percents T2T FAQ:   fraction help MIDDLE SCHOOL About Math Algebra    equations    factoring expressions    graphing equations Arithmetic    division    exponents    factorials    factoring numbers    fractions/percents    logarithms Definitions Geometry    2-dimensional      conic sections/        circles      triangles/polygons    3D and higher      polyhedra History/Biography Logic Measurement    calendars/      dates/time    temperature    terms/units Number Sense    factoring numbers    negative numbers    pi    prime numbers    square roots Probability Puzzles Ratio/Proportion Statistics Word Problems Browse Middle School Fractions & Percentages Stars indicate particularly interesting answers or good places to begin browsing. 100 Percent of Daily Allowance of Iron [09/30/2001] A common foodstuff is found to contain .00125% iron. The serving size is 87.0 grams. If the recommended daily allowance is 18mg of iron, how many servings would a person have to eat to get 100% of the daily allowance of iron? 2a/5 or 2a Divided by 5? [12/13/2001] Why, when writing a division problem, do you write 2a over 5 instead of 2a divided by 5? 33 1/3 Percent as a Fraction [08/03/2003] I need help turning percents like 33 1/3%, 2.5%, and other percents like that into fractions. (9/2)/(3/4): A Picture [03/27/2003] We were trying to find a division fraction question and everything we came up with turned into a multiplication fraction problem. Why is that? Adding and Subtracting Fractions [10/25/1999] Can you help me learn to add and subtract fractions? Adding Mixed Numbers [04/13/1999] How do you add mixed numbers without renaming? Algebraic Fractions [5/27/1996] How would you solve for x and find the least common denominator in the equation 2/x = 4/3? Algebra using Fractions [5/27/1996] Please show me how to solve this equation: (5/8)X = 9 Cancelling Fractions [03/06/2002] How do I cancel this problem: 1/5 x 40/1 x 1/2 ? Changing Decimals to Fractions and Reducing [12/12/2002] Could you please help me to understand, in the simplest way, how to write a decimal as a lowest-term fraction or mixed number? Checking Proportions using Square Roots [04/11/2002] Multiply two fractions, and then take their square root. If it equals one of the fractions you began with, you have a true proportion. Does this always work? Clarifying Fraction Notation [07/02/1997] .83 1/3... a trick problem? Congruent Fractions [04/03/1997] What are congruent fractions? Converting Fractions to Decimals [01/08/1997] How do you convert fractions to decimals? How do you turn decimals into ratios? Converting Ratios to Percentages [08/03/2003] How do I convert 1:200 to a percentage? Converting Repeating Decimals to Fractions [11/19/1997] I know .333333333333 is 1/3, but what is the trick to it? Cross-Multiplication [08/04/2002] Can you explain cross-multiplication? Decimal in the Denominator Visualized [12/13/2013] A young adult struggles to visually model and evaluate a fraction that has a decimal in its denominator. Doctors Jerry and Peterson suggest equivalent fractions, inverses, and scale models. Diagram Showing Division of Fractions [01/13/2002] I understand how to divide fractions, but would like to be able to draw this problem in a diagram: (2/3)/(3/4) = 8/9. Dividing a Fraction by a Fraction [08/11/1997] Can you help students visualize a problem such as: 1/3 / 1/2 = 2/3 ? Dividing by a Negative Fraction [01/24/2002] I understand how to divide fractions, but what if one of them is negative? Dividing Fractions [7/5/1996] I always get stuck on dividing fractions. Dividing Fractions to find Decimals [03/12/2001] Why does dividing the numerator by the denominator give you the decimal form of a fraction? Division [11/25/1997] How do you divide 1,000,000,000,000 by 999,999,999,999,999,999,999? Employee Pay Schedule [07/12/2003] For a particular job, Moe should get 40% of the gross pay, Larry should get 30%, and Curly should get 30%, assuming they all work the same number of hours. But how should the money be divided if they work different numbers of hours? Explaining Division of Fractions [08/11/1999] Can you give a practical explanation of why the 'invert-and-multiply' rule for division of fractions works? Explaining Fractions [11/06/2001] I am a practicum student in a 8th grade math class. The teacher and I don't know how to explain to the students why you can do this manuever. c=d/g; c/d=g; d/c=g. Figuring a Percentage [5/24/1996] What percentage is 3 times as many? Figuring a Tax [05/13/2003] I work in insurance. We have a premium of \$75,329. This premium needs to be increased by a tax of 3.75%... Figuring Percentage of Increase [09/05/2001] In 1990, Allen County, Kansas, had 14,385 people. Now, in 2001, it contains 14,905 people. How do I calculate the increase, using a percentage? Finding a Percentage [01/26/2001] How do you arrive at a percentage that a number is of a number? Example: what percent of 32000 is 2000? Finding Percentage of Increase [06/07/2003] Find the percentage increase: old, \$50.50; new \$75.75. Finding Percentages [12/5/1996] I want to know how to find percents of a number - for example, how to find 13 percent of 29. Finding the Lowest Common Denominator [12/11/1995] What is the most efficient way to find the lcd (lowest common denominator)? Fractional Exponents [08/09/1997] Is there a proof for X^1/2 = the square root of X? Fraction Bar Name [12/14/1996] What is the name of the little line that separates the divisor from the dividend in a standard division question? Fraction Basics [7/21/1996] I don't understand how to do fractions. Fraction Diagrams [03/13/2002] In an adult condominium complex, 2/3 of the men are married to 3/5 of the women. What fraction of the residents are married? A Fraction Divided By a Fraction [8/30/1995] What is 18/6 divided by 2/3? Fraction Multiplication [7/22/1996] The meaning of the dot between two fractions. Page:  1  2  3  4  5  6  7  8  9 [next>]

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