Subtract 40/14 from 20/18, Solve 1 2/18

Subtract 40/14 from 20/18

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

20/18 - 40/14 is -110/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126
Likewise, for the 2nd fraction, since 14 × 9 = 126,
40/14 = 40 × 9/14 × 9 = 360/126
Subtract the two like fractions:
140/126 - 360/126 = 140 - 360/126 = -220/126
After reducing the fraction, the answer is -110/63

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