Add 21/6 and 90/63, Solve 3 3/6 + 1 27/63 as a fraction

Add 21/6 and 90/63

1^st number: 3 3/6, 2^nd number: 1 27/63

21/6 + 90/63 is 69/14.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 6 × 21 = 126,
21/6 = 21 × 21/6 × 21 = 441/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
90/63 = 90 × 2/63 × 2 = 180/126
Add the two like fractions:
441/126 + 180/126 = 441 + 180/126 = 621/126
621/126 simplified gives 69/14
So, 21/6 + 90/63 = 69/14
In mixed form: 413/14

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