Add 27/7 and 42/18, Solve 3 6/7 + 2 6/18 as a fraction

Add 27/7 and 42/18

1^st number: 3 6/7, 2^nd number: 2 6/18

27/7 + 42/18 is 130/21.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
27/7 = 27 × 18/7 × 18 = 486/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126
Add the two like fractions:
486/126 + 294/126 = 486 + 294/126 = 780/126
780/126 simplified gives 130/21
So, 27/7 + 42/18 = 130/21
In mixed form: 64/21

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