Subtract 42/70 from 20/27
20/27 - 42/70 is 19/135.
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,
20/27 = 20 × 70/27 × 70 = 1400/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
42/70 = 42 × 27/70 × 27 = 1134/1890 - Subtract the two like fractions:
1400/1890 - 1134/1890 = 1400 - 1134/1890 = 266/1890 - After reducing the fraction, the answer is 19/135
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