Subtract 21/27 from 81/2
1st number: 40 1/2, 2nd number: 21/27
81/2 - 21/27 is 715/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
81/2 = 81 × 27/2 × 27 = 2187/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
21/27 = 21 × 2/27 × 2 = 42/54 - Subtract the two like fractions:
2187/54 - 42/54 = 2187 - 42/54 = 2145/54 - After reducing the fraction, the answer is 715/18
- In mixed form: 3913/18
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