Solutions by everydaycalculation.com

1^{st} number: 16/81, 2^{nd} number: 1 7/20

1681 + 2720 is 25071620.

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

LCM of 81 and 20 is**1620**

Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,

1681 = 16 × 2081 × 20 = 3201620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,

2720 = 27 × 8120 × 81 = 21871620 - Add the two like fractions:

3201620 + 21871620 = 320 + 21871620 = 25071620 - So, 16/81 + 27/20 = 2507/1620

In mixed form: 18871620

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