Solutions by everydaycalculation.com

13 + 15 is 815.

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

LCM of 3 and 5 is**15**

Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,

13 = 1 × 53 × 5 = 515 - Likewise, for the 2nd fraction, since 5 × 3 = 15,

15 = 1 × 35 × 3 = 315 - Add the two like fractions:

515 + 315 = 5 + 315 = 815 - So, 1/3 + 1/5 = 8/15

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