Subtract 30/18 from 81/14, Solve 5 11/14

Subtract 30/18 from 81/14

1^st number: 5 11/14, 2^nd number: 1 12/18

81/14 - 30/18 is 173/42.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
81/14 = 81 × 9/14 × 9 = 729/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126
Subtract the two like fractions:
729/126 - 210/126 = 729 - 210/126 = 519/126
After reducing the fraction, the answer is 173/42
In mixed form: 45/42

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