Subtract 49/70 from 12/9, Solve 1 3/9

Subtract 49/70 from 12/9

1^st number: 1 3/9, 2^nd number: 49/70

12/9 - 49/70 is 19/30.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 9 × 70 = 630,
12/9 = 12 × 70/9 × 70 = 840/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
49/70 = 49 × 9/70 × 9 = 441/630
Subtract the two like fractions:
840/630 - 441/630 = 840 - 441/630 = 399/630
After reducing the fraction, the answer is 19/30

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