Add 54/42 and 27/18, Solve 1 12/42 + 1 9/18 as a fraction

Add 54/42 and 27/18

1^st number: 1 12/42, 2^nd number: 1 9/18

54/42 + 27/18 is 39/14.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
54/42 = 54 × 3/42 × 3 = 162/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126
Add the two like fractions:
162/126 + 189/126 = 162 + 189/126 = 351/126
351/126 simplified gives 39/14
So, 54/42 + 27/18 = 39/14
In mixed form: 211/14

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