Add 81/70 and 35/12, Solve 1 11/70 + 2 11/12 as a fraction

Add 81/70 and 35/12

1^st number: 1 11/70, 2^nd number: 2 11/12

81/70 + 35/12 is 1711/420.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
35/12 = 35 × 35/12 × 35 = 1225/420
Add the two like fractions:
486/420 + 1225/420 = 486 + 1225/420 = 1711/420
So, 81/70 + 35/12 = 1711/420
In mixed form: 431/420

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