Add 12/9 and 12/7, Solve 1 3/9 + 1 5/7 as a fraction

Add 12/9 and 12/7

1^st number: 1 3/9, 2^nd number: 1 5/7

12/9 + 12/7 is 64/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63
Likewise, for the 2nd fraction, since 7 × 9 = 63,
12/7 = 12 × 9/7 × 9 = 108/63
Add the two like fractions:
84/63 + 108/63 = 84 + 108/63 = 192/63
192/63 simplified gives 64/21
So, 12/9 + 12/7 = 64/21
In mixed form: 31/21

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