Subtract 12/54 from 40/21
1st number: 1 19/21, 2nd number: 12/54
40/21 - 12/54 is 106/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
40/21 = 40 × 18/21 × 18 = 720/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
12/54 = 12 × 7/54 × 7 = 84/378 - Subtract the two like fractions:
720/378 - 84/378 = 720 - 84/378 = 636/378 - After reducing the fraction, the answer is 106/63
- In mixed form: 143/63
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