Solutions by everydaycalculation.com

1^{st} number: 7 0/9, 2^{nd} number: 4 6/12

639 + 5412 is 232.

- Find the least common denominator or LCM of the two denominators:

LCM of 9 and 12 is**36**

Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,

639 = 63 × 49 × 4 = 25236 - Likewise, for the 2nd fraction, since 12 × 3 = 36,

5412 = 54 × 312 × 3 = 16236 - Add the two like fractions:

25236 + 16236 = 252 + 16236 = 41436 - 414/36 simplified gives 232
- So, 63/9 + 54/12 = 23/2

In mixed form: 1112

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