Add 63/21 and 27/18, Solve 3 0/21 + 1 9/18 as a fraction

Add 63/21 and 27/18

1^st number: 3 0/21, 2^nd number: 1 9/18

63/21 + 27/18 is 9/2.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
63/21 = 63 × 6/21 × 6 = 378/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126
Add the two like fractions:
378/126 + 189/126 = 378 + 189/126 = 567/126
567/126 simplified gives 9/2
So, 63/21 + 27/18 = 9/2
In mixed form: 41/2

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