Subtract 30/54 from 81/12, Solve 6 9/12

Subtract 30/54 from 81/12

1^st number: 6 9/12, 2^nd number: 30/54

81/12 - 30/54 is 223/36.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 54 is 108

Next, find the equivalent fraction of both fractional numbers with denominator 108
For the 1st fraction, since 12 × 9 = 108,
81/12 = 81 × 9/12 × 9 = 729/108
Likewise, for the 2nd fraction, since 54 × 2 = 108,
30/54 = 30 × 2/54 × 2 = 60/108
Subtract the two like fractions:
729/108 - 60/108 = 729 - 60/108 = 669/108
After reducing the fraction, the answer is 223/36
In mixed form: 67/36

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