Subtract 45/18 from 42/7
1st number: 6 0/7, 2nd number: 2 9/18
42/7 - 45/18 is 7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
42/7 = 42 × 18/7 × 18 = 756/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
45/18 = 45 × 7/18 × 7 = 315/126 - Subtract the two like fractions:
756/126 - 315/126 = 756 - 315/126 = 441/126 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
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