Solutions by everydaycalculation.com

1^{st} number: 4 4/9, 2^{nd} number: 45/80

409 + 4580 is 721144.

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

LCM of 9 and 80 is**720**

Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,

409 = 40 × 809 × 80 = 3200720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,

4580 = 45 × 980 × 9 = 405720 - Add the two like fractions:

3200720 + 405720 = 3200 + 405720 = 3605720 - 3605/720 simplified gives 721144
- So, 40/9 + 45/80 = 721/144

In mixed form: 51144

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