Subtract 1/21 from 81/35
1st number: 2 11/35, 2nd number: 1/21
81/35 - 1/21 is 34/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
81/35 = 81 × 3/35 × 3 = 243/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Subtract the two like fractions:
243/105 - 5/105 = 243 - 5/105 = 238/105 - After reducing the fraction, the answer is 34/15
- In mixed form: 24/15
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