Subtract 72/21 from 10/54
1st number: 10/54, 2nd number: 3 9/21
10/54 - 72/21 is -613/189.
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,
10/54 = 10 × 7/54 × 7 = 70/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
72/21 = 72 × 18/21 × 18 = 1296/378 - Subtract the two like fractions:
70/378 - 1296/378 = 70 - 1296/378 = -1226/378 - After reducing the fraction, the answer is -613/189
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