Subtract 2/21 from 81/5
1st number: 16 1/5, 2nd number: 2/21
81/5 - 2/21 is 1691/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
81/5 = 81 × 21/5 × 21 = 1701/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105 - Subtract the two like fractions:
1701/105 - 10/105 = 1701 - 10/105 = 1691/105 - In mixed form: 1611/105
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