Subtract 35/15 from 12/21
1st number: 12/21, 2nd number: 2 5/15
12/21 - 35/15 is -37/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
12/21 = 12 × 5/21 × 5 = 60/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
35/15 = 35 × 7/15 × 7 = 245/105 - Subtract the two like fractions:
60/105 - 245/105 = 60 - 245/105 = -185/105 - After reducing the fraction, the answer is -37/21
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