Subtract 10/16 from 81/42
1st number: 1 39/42, 2nd number: 10/16
81/42 - 10/16 is 73/56.
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,
81/42 = 81 × 8/42 × 8 = 648/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
10/16 = 10 × 21/16 × 21 = 210/336 - Subtract the two like fractions:
648/336 - 210/336 = 648 - 210/336 = 438/336 - After reducing the fraction, the answer is 73/56
- In mixed form: 117/56
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