Subtract 81/21 from 12/35
1st number: 12/35, 2nd number: 3 18/21
12/35 - 81/21 is -123/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
12/35 = 12 × 3/35 × 3 = 36/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
81/21 = 81 × 5/21 × 5 = 405/105 - Subtract the two like fractions:
36/105 - 405/105 = 36 - 405/105 = -369/105 - After reducing the fraction, the answer is -123/35
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