Subtract 20/70 from 18/27
18/27 - 20/70 is 8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 27 × 70 = 1890,
18/27 = 18 × 70/27 × 70 = 1260/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
20/70 = 20 × 27/70 × 27 = 540/1890 - Subtract the two like fractions:
1260/1890 - 540/1890 = 1260 - 540/1890 = 720/1890 - After reducing the fraction, the answer is 8/21
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