Subtract 20/18 from 7/49, Solve 7/49

Subtract 20/18 from 7/49

1^st number: 7/49, 2^nd number: 1 2/18

7/49 - 20/18 is -61/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 49 × 18 = 882,
7/49 = 7 × 18/49 × 18 = 126/882
Likewise, for the 2nd fraction, since 18 × 49 = 882,
20/18 = 20 × 49/18 × 49 = 980/882
Subtract the two like fractions:
126/882 - 980/882 = 126 - 980/882 = -854/882
After reducing the fraction, the answer is -61/63

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