Subtract 81/16 from 4/42
1st number: 4/42, 2nd number: 5 1/16
4/42 - 81/16 is -1669/336.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
4/42 = 4 × 8/42 × 8 = 32/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
81/16 = 81 × 21/16 × 21 = 1701/336 - Subtract the two like fractions:
32/336 - 1701/336 = 32 - 1701/336 = -1669/336
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