Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 decade ago

how do i convert a fraction to a decimal?

it is 49/121 i need to convert that to a decimal in Cm.

11 Answers

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  • 1 decade ago
    Favorite Answer

    Long division or a calculator.

    121 ) 49

    49/121 = 0.40495867768595041322314049586777

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  • 1 decade ago

    The easiest way is dividing 49 by 121 on the calculator.

    Or, you can use long division and divide 49 by 121.

    If you want to cheat check out my source below, it will do the work for you.

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  • 1 decade ago

    The first step is to divide 49 by 121.

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  • Anonymous
    1 decade ago

    Just take 49 and divide it by 121:

    49/121=.405

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  • 1 decade ago

    Jim burne... had the answer, but i think you should round it to the the least number of places (49 has 2, 121 has 3, so the answer would be rounded to 2 places unless otherwise commanded. so the answer would be 0.40 cm. If i didn't know for sure I would ask the teacher right before i turned it in.

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  • 1 decade ago

    Note the following pattern for repeating decimals:

    0.22222222... = 2/9

    0.54545454... = 54/99

    0.298298298... = 298/999

    Division by 9's causes the repeating pattern.

    Note the pattern if zeros preceed the repeating decimal:

    0.022222222... = 2/90

    0.00054545454... = 54/99000

    0.00298298298... = 298/99900

    Adding zero's to the denominator adds zero's before the repeating decimal.

    To convert a decimal that begins with a non-repeating part, such as 0.21456456456456456..., to a fraction, write it as the sum of the non-repeating part and the repeating part.

    0.21 + 0.00456456456456456...

    Next, convert each of these decimals to fractions. The first decimal has a divisor of power ten. The second decimal (which repeats) is convirted according to the pattern given above.

    21/100 + 456/99900

    Now add these fraction by expressing both with a common divisor

    20979/99900 + 456/99900

    and add.

    21435/99900

    Finally simplify it to lowest terms

    1429/6660

    and check on your calculator or with long division.

    = 0.2145645645...

    Source(s): oh my own
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  • 1 decade ago

    Simply divide 49/121.

    You can do it on your calculator to get .404958678..

    Or use long division. :)

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  • 1 decade ago

    on calc, punch in 49, punch the division sign, punch in 121, punch = sign. There is your answer.

    Source(s): 3rd grade math
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  • 1 decade ago

    just divide

    49/121=0.4050 cm

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  • 1 decade ago

    go to google and type it in and hit search

    try this link:

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