Add 81/42 and 81/6, Solve 1 39/42 + 13 3/6 as a fraction

Add 81/42 and 81/6

1^st number: 1 39/42, 2^nd number: 13 3/6

81/42 + 81/6 is 108/7.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 42 × 1 = 42,
81/42 = 81 × 1/42 × 1 = 81/42
Likewise, for the 2nd fraction, since 6 × 7 = 42,
81/6 = 81 × 7/6 × 7 = 567/42
Add the two like fractions:
81/42 + 567/42 = 81 + 567/42 = 648/42
648/42 simplified gives 108/7
So, 81/42 + 81/6 = 108/7
In mixed form: 153/7

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