Subtract 21/15 from 12/56
1st number: 12/56, 2nd number: 1 6/15
12/56 - 21/15 is -83/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 15 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
12/56 = 12 × 15/56 × 15 = 180/840 - Likewise, for the 2nd fraction, since 15 × 56 = 840,
21/15 = 21 × 56/15 × 56 = 1176/840 - Subtract the two like fractions:
180/840 - 1176/840 = 180 - 1176/840 = -996/840 - After reducing the fraction, the answer is -83/70
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