Subtract 56/18 from 1/7, Solve 1/7 - 3 2/18 as a fraction

Subtract 56/18 from 1/7

1^st number: 1/7, 2^nd number: 3 2/18

1/7 - 56/18 is -187/63.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
1/7 = 1 × 18/7 × 18 = 18/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
56/18 = 56 × 7/18 × 7 = 392/126
Subtract the two like fractions:
18/126 - 392/126 = 18 - 392/126 = -374/126
After reducing the fraction, the answer is -187/63

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