Subtract 75/54 from 42/70
1st number: 42/70, 2nd number: 1 21/54
42/70 - 75/54 is -71/90.
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,
75/54 = 75 × 35/54 × 35 = 2625/1890 - Subtract the two like fractions:
1134/1890 - 2625/1890 = 1134 - 2625/1890 = -1491/1890 - After reducing the fraction, the answer is -71/90
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