Solutions by everydaycalculation.com

1^{st} number: 7 0/9, 2^{nd} number: 1 12/42

639 + 5442 is 587.

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

LCM of 9 and 42 is**126**

Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,

639 = 63 × 149 × 14 = 882126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,

5442 = 54 × 342 × 3 = 162126 - Add the two like fractions:

882126 + 162126 = 882 + 162126 = 1044126 - 1044/126 simplified gives 587
- So, 63/9 + 54/42 = 58/7

In mixed form: 827

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