Add 63/9 and 40/21, Solve 7 0/9 + 1 19/21 as a fraction

Add 63/9 and 40/21

1^st number: 7 0/9, 2^nd number: 1 19/21

63/9 + 40/21 is 187/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 9 × 7 = 63,
63/9 = 63 × 7/9 × 7 = 441/63
Likewise, for the 2nd fraction, since 21 × 3 = 63,
40/21 = 40 × 3/21 × 3 = 120/63
Add the two like fractions:
441/63 + 120/63 = 441 + 120/63 = 561/63
561/63 simplified gives 187/21
So, 63/9 + 40/21 = 187/21
In mixed form: 819/21

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