Subtract 42/49 from 15/18
15/18 - 42/49 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 18 × 49 = 882,
15/18 = 15 × 49/18 × 49 = 735/882 - Likewise, for the 2nd fraction, since 49 × 18 = 882,
42/49 = 42 × 18/49 × 18 = 756/882 - Subtract the two like fractions:
735/882 - 756/882 = 735 - 756/882 = -21/882 - After reducing the fraction, the answer is -1/42
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