Subtract 42/7 from 45/18
1st number: 2 9/18, 2nd number: 6 0/7
45/18 - 42/7 is -7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
45/18 = 45 × 7/18 × 7 = 315/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
42/7 = 42 × 18/7 × 18 = 756/126 - Subtract the two like fractions:
315/126 - 756/126 = 315 - 756/126 = -441/126 - After reducing the fraction, the answer is -7/2
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