Subtract 81/49 from 42/18
1st number: 2 6/18, 2nd number: 1 32/49
42/18 - 81/49 is 100/147.
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,
42/18 = 42 × 49/18 × 49 = 2058/882 - Likewise, for the 2nd fraction, since 49 × 18 = 882,
81/49 = 81 × 18/49 × 18 = 1458/882 - Subtract the two like fractions:
2058/882 - 1458/882 = 2058 - 1458/882 = 600/882 - After reducing the fraction, the answer is 100/147
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