Subtract 42/27 from 9/7
1st number: 1 2/7, 2nd number: 1 15/27
9/7 - 42/27 is -17/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
9/7 = 9 × 27/7 × 27 = 243/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
42/27 = 42 × 7/27 × 7 = 294/189 - Subtract the two like fractions:
243/189 - 294/189 = 243 - 294/189 = -51/189 - After reducing the fraction, the answer is -17/63
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