Subtract 75/21 from 28/54
1st number: 28/54, 2nd number: 3 12/21
28/54 - 75/21 is -577/189.
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,
28/54 = 28 × 7/54 × 7 = 196/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
75/21 = 75 × 18/21 × 18 = 1350/378 - Subtract the two like fractions:
196/378 - 1350/378 = 196 - 1350/378 = -1154/378 - After reducing the fraction, the answer is -577/189
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