Subtract 8/14 from 81/21
1st number: 3 18/21, 2nd number: 8/14
81/21 - 8/14 is 23/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
8/14 = 8 × 3/14 × 3 = 24/42 - Subtract the two like fractions:
162/42 - 24/42 = 162 - 24/42 = 138/42 - After reducing the fraction, the answer is 23/7
- In mixed form: 32/7
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