Subtract 21/9 from 81/2
1st number: 40 1/2, 2nd number: 2 3/9
81/2 - 21/9 is 229/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
81/2 = 81 × 9/2 × 9 = 729/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
21/9 = 21 × 2/9 × 2 = 42/18 - Subtract the two like fractions:
729/18 - 42/18 = 729 - 42/18 = 687/18 - After reducing the fraction, the answer is 229/6
- In mixed form: 381/6
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