Subtract 4/7 from 81/20
1st number: 4 1/20, 2nd number: 4/7
81/20 - 4/7 is 487/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
4/7 = 4 × 20/7 × 20 = 80/140 - Subtract the two like fractions:
567/140 - 80/140 = 567 - 80/140 = 487/140 - In mixed form: 367/140
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