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Subtraction of fractions with different denominators

Example:: $Subtract fractions examples$

Solution:: The denominator of the first fraction is 6, and 6 = 2 × 3; The denominator of the second fraction is 10, and 10 = 2 × 5; Thus, the least common denominator (LCD) is 2 × 3 × 5 = 30; $Subtract fractions examples$

Note:: The denominators of the fractions can not be zero.

Formula to subtract two fractions:: a/b - c/d = (ad - cb)/bd, in which the denominators b and d can not be zero