Solutions by everydaycalculation.com

1^{st} number: 7 0/9, 2^{nd} number: 1 24/30

639 + 5430 is 445.

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

LCM of 9 and 30 is**90**

Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,

639 = 63 × 109 × 10 = 63090 - Likewise, for the 2nd fraction, since 30 × 3 = 90,

5430 = 54 × 330 × 3 = 16290 - Add the two like fractions:

63090 + 16290 = 630 + 16290 = 79290 - 792/90 simplified gives 445
- So, 63/9 + 54/30 = 44/5

In mixed form: 845

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