Subtract 45/54 from 42/70
42/70 - 45/54 is -7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 54 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
42/70 = 42 × 27/70 × 27 = 1134/1890 - Likewise, for the 2nd fraction, since 54 × 35 = 1890,
45/54 = 45 × 35/54 × 35 = 1575/1890 - Subtract the two like fractions:
1134/1890 - 1575/1890 = 1134 - 1575/1890 = -441/1890 - After reducing the fraction, the answer is -7/30
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