Add 63/54 and 21/42, Solve 1 9/54 + 21/42 as a fraction

Add 63/54 and 21/42

1^st number: 1 9/54, 2^nd number: 21/42

63/54 + 21/42 is 5/3.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
63/54 = 63 × 7/54 × 7 = 441/378
Likewise, for the 2nd fraction, since 42 × 9 = 378,
21/42 = 21 × 9/42 × 9 = 189/378
Add the two like fractions:
441/378 + 189/378 = 441 + 189/378 = 630/378
630/378 simplified gives 5/3
So, 63/54 + 21/42 = 5/3
In mixed form: 12/3

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