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The easiest is to convert both mixed form numbers to improper fractions, do the subtraction (as normal1) and if the result is an improper fraction convert it to mixed form. 1 by converting the improper fractions to equivalent [improper] fractions with a common denominator and subtracting the resultant numerators.
Okay... say you had the result to a sum of 67/16... this is an improper fraction. If you divide 16 into 67, it goes 4 times, with 3 left over so... the correct form of the improper fraction is 43/16 as a mixed number.
To convert a mixed number to an improper fraction, multiply whole number part by the denominator of the fraction part, then add the numerator to the product. The result is the numerator of the improper fraction. The denominator remains the same. For example, to convert 2 3/8 to an improper fraction, multiply 2*8 = 16, then add 3 to get 19. The improper fraction is 19/8.
Make the denominators the same using equivalent fractionsAdd or subtract the numerators.Change the result to a mixed fraction if the numerator is larger thanthe denominator.Simplify the final result if possible.
An improper fraction is one in which the numerator is larger than the denominator, as a result of which the value of the fraction is greater than one, and it could be expressed therefore as some integer plus a proper fraction in which the numerator is smaller than the denominator.