Subtract 5/81 from 42/49
42/49 - 5/81 is 451/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
42/49 = 42 × 81/49 × 81 = 3402/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
5/81 = 5 × 49/81 × 49 = 245/3969 - Subtract the two like fractions:
3402/3969 - 245/3969 = 3402 - 245/3969 = 3157/3969 - After reducing the fraction, the answer is 451/567
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