Subtract 30/21 from 81/14
1st number: 5 11/14, 2nd number: 1 9/21
81/14 - 30/21 is 61/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
81/14 = 81 × 3/14 × 3 = 243/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
30/21 = 30 × 2/21 × 2 = 60/42 - Subtract the two like fractions:
243/42 - 60/42 = 243 - 60/42 = 183/42 - After reducing the fraction, the answer is 61/14
- In mixed form: 45/14
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