Add 63/42 and 42/18, Solve 1 21/42 + 2 6/18 as a fraction

Add 63/42 and 42/18

1^st number: 1 21/42, 2^nd number: 2 6/18

63/42 + 42/18 is 23/6.

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,
63/42 = 63 × 3/42 × 3 = 189/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126
Add the two like fractions:
189/126 + 294/126 = 189 + 294/126 = 483/126
483/126 simplified gives 23/6
So, 63/42 + 42/18 = 23/6
In mixed form: 35/6

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