Subtract 54/21 from 63/36
1st number: 1 27/36, 2nd number: 2 12/21
63/36 - 54/21 is -23/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
63/36 = 63 × 7/36 × 7 = 441/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
54/21 = 54 × 12/21 × 12 = 648/252 - Subtract the two like fractions:
441/252 - 648/252 = 441 - 648/252 = -207/252 - After reducing the fraction, the answer is -23/28
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