Subtract 20/42 from 81/6
1st number: 13 3/6, 2nd number: 20/42
81/6 - 20/42 is 547/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
81/6 = 81 × 7/6 × 7 = 567/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Subtract the two like fractions:
567/42 - 20/42 = 567 - 20/42 = 547/42 - In mixed form: 131/42
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