Subtract 18/27 from 45/70
45/70 - 18/27 is -1/42.
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,
45/70 = 45 × 27/70 × 27 = 1215/1890 - Likewise, for the 2nd fraction, since 27 × 70 = 1890,
18/27 = 18 × 70/27 × 70 = 1260/1890 - Subtract the two like fractions:
1215/1890 - 1260/1890 = 1215 - 1260/1890 = -45/1890 - After reducing the fraction, the answer is -1/42
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