Subtract 3/9 from 81/12, Solve 6 9/12

Subtract 3/9 from 81/12

1^st number: 6 9/12, 2^nd number: 3/9

81/12 - 3/9 is 77/12.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 12 × 3 = 36,
81/12 = 81 × 3/12 × 3 = 243/36
Likewise, for the 2nd fraction, since 9 × 4 = 36,
3/9 = 3 × 4/9 × 4 = 12/36
Subtract the two like fractions:
243/36 - 12/36 = 243 - 12/36 = 231/36
After reducing the fraction, the answer is 77/12
In mixed form: 65/12

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