Subtract 81/42 from 9/16
1st number: 9/16, 2nd number: 1 39/42
9/16 - 81/42 is -153/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 42 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
9/16 = 9 × 21/16 × 21 = 189/336 - Likewise, for the 2nd fraction, since 42 × 8 = 336,
81/42 = 81 × 8/42 × 8 = 648/336 - Subtract the two like fractions:
189/336 - 648/336 = 189 - 648/336 = -459/336 - After reducing the fraction, the answer is -153/112
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