Subtract 80/49 from 20/18, Solve 1 2/18

Subtract 80/49 from 20/18

1^st number: 1 2/18, 2^nd number: 1 31/49

20/18 - 80/49 is -230/441.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 18 × 49 = 882,
20/18 = 20 × 49/18 × 49 = 980/882
Likewise, for the 2nd fraction, since 49 × 18 = 882,
80/49 = 80 × 18/49 × 18 = 1440/882
Subtract the two like fractions:
980/882 - 1440/882 = 980 - 1440/882 = -460/882
After reducing the fraction, the answer is -230/441

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