Subtract 30/8 from 18/49, Solve 18/49

Subtract 30/8 from 18/49

1^st number: 18/49, 2^nd number: 3 6/8

18/49 - 30/8 is -663/196.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 8 is 392

Next, find the equivalent fraction of both fractional numbers with denominator 392
For the 1st fraction, since 49 × 8 = 392,
18/49 = 18 × 8/49 × 8 = 144/392
Likewise, for the 2nd fraction, since 8 × 49 = 392,
30/8 = 30 × 49/8 × 49 = 1470/392
Subtract the two like fractions:
144/392 - 1470/392 = 144 - 1470/392 = -1326/392
After reducing the fraction, the answer is -663/196

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