Subtract 81/56 from 42/18
1st number: 2 6/18, 2nd number: 1 25/56
42/18 - 81/56 is 149/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 18 × 28 = 504,
42/18 = 42 × 28/18 × 28 = 1176/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
81/56 = 81 × 9/56 × 9 = 729/504 - Subtract the two like fractions:
1176/504 - 729/504 = 1176 - 729/504 = 447/504 - After reducing the fraction, the answer is 149/168
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