Subtract 45/42 from 3/18
1st number: 3/18, 2nd number: 1 3/42
3/18 - 45/42 is -19/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
45/42 = 45 × 3/42 × 3 = 135/126 - Subtract the two like fractions:
21/126 - 135/126 = 21 - 135/126 = -114/126 - After reducing the fraction, the answer is -19/21
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