Subtract 81/27 from 28/70
1st number: 28/70, 2nd number: 3 0/27
28/70 - 81/27 is -13/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
28/70 = 28 × 27/70 × 27 = 756/1890 - Likewise, for the 2nd fraction, since 27 × 70 = 1890,
81/27 = 81 × 70/27 × 70 = 5670/1890 - Subtract the two like fractions:
756/1890 - 5670/1890 = 756 - 5670/1890 = -4914/1890 - After reducing the fraction, the answer is -13/5
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