Subtract 42/8 from 30/49, Solve 30/49

Subtract 42/8 from 30/49

1^st number: 30/49, 2^nd number: 5 2/8

30/49 - 42/8 is -909/196.

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,
30/49 = 30 × 8/49 × 8 = 240/392
Likewise, for the 2nd fraction, since 8 × 49 = 392,
42/8 = 42 × 49/8 × 49 = 2058/392
Subtract the two like fractions:
240/392 - 2058/392 = 240 - 2058/392 = -1818/392
After reducing the fraction, the answer is -909/196

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