Subtract 20/49 from 30/8, Solve 3 6/8

Subtract 20/49 from 30/8

1^st number: 3 6/8, 2^nd number: 20/49

30/8 - 20/49 is 655/196.

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

Next, find the equivalent fraction of both fractional numbers with denominator 392
For the 1st fraction, since 8 × 49 = 392,
30/8 = 30 × 49/8 × 49 = 1470/392
Likewise, for the 2nd fraction, since 49 × 8 = 392,
20/49 = 20 × 8/49 × 8 = 160/392
Subtract the two like fractions:
1470/392 - 160/392 = 1470 - 160/392 = 1310/392
After reducing the fraction, the answer is 655/196
In mixed form: 367/196

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