Add 64/21 and 14/80, Solve 3 1/21 + 14/80 as a fraction

Add 64/21 and 14/80

1^st number: 3 1/21, 2^nd number: 14/80

64/21 + 14/80 is 2707/840.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 21 × 80 = 1680,
64/21 = 64 × 80/21 × 80 = 5120/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
14/80 = 14 × 21/80 × 21 = 294/1680
Add the two like fractions:
5120/1680 + 294/1680 = 5120 + 294/1680 = 5414/1680
5414/1680 simplified gives 2707/840
So, 64/21 + 14/80 = 2707/840
In mixed form: 3187/840

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