Subtract 42/70 from 12/54
12/54 - 42/70 is -17/45.
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,
12/54 = 12 × 35/54 × 35 = 420/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
42/70 = 42 × 27/70 × 27 = 1134/1890 - Subtract the two like fractions:
420/1890 - 1134/1890 = 420 - 1134/1890 = -714/1890 - After reducing the fraction, the answer is -17/45
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