Subtract 72/21 from 8/54
1st number: 8/54, 2nd number: 3 9/21
8/54 - 72/21 is -620/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
8/54 = 8 × 7/54 × 7 = 56/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
72/21 = 72 × 18/21 × 18 = 1296/378 - Subtract the two like fractions:
56/378 - 1296/378 = 56 - 1296/378 = -1240/378 - After reducing the fraction, the answer is -620/189
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