Add 20/42 and 63/18, Solve 20/42 + 3 9/18 as a fraction

Add 20/42 and 63/18

1^st number: 20/42, 2^nd number: 3 9/18

20/42 + 63/18 is 167/42.

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,
20/42 = 20 × 3/42 × 3 = 60/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
63/18 = 63 × 7/18 × 7 = 441/126
Add the two like fractions:
60/126 + 441/126 = 60 + 441/126 = 501/126
501/126 simplified gives 167/42
So, 20/42 + 63/18 = 167/42
In mixed form: 341/42

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