Solutions by everydaycalculation.com

89 + 810 is 7645.

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

LCM of 9 and 10 is**90**

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

89 = 8 × 109 × 10 = 8090 - Likewise, for the 2nd fraction, since 10 × 9 = 90,

810 = 8 × 910 × 9 = 7290 - Add the two like fractions:

8090 + 7290 = 80 + 7290 = 15290 - 152/90 simplified gives 7645
- So, 8/9 + 8/10 = 76/45

In mixed form: 13145

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