Subtract 81/21 from 54/12
1st number: 4 6/12, 2nd number: 3 18/21
54/12 - 81/21 is 9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
54/12 = 54 × 7/12 × 7 = 378/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
81/21 = 81 × 4/21 × 4 = 324/84 - Subtract the two like fractions:
378/84 - 324/84 = 378 - 324/84 = 54/84 - After reducing the fraction, the answer is 9/14
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