Subtract 40/70 from 20/54
20/54 - 40/70 is -38/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 54 × 35 = 1890,
20/54 = 20 × 35/54 × 35 = 700/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
40/70 = 40 × 27/70 × 27 = 1080/1890 - Subtract the two like fractions:
700/1890 - 1080/1890 = 700 - 1080/1890 = -380/1890 - After reducing the fraction, the answer is -38/189
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