Add 18/21 and 63/5, Solve 18/21 + 12 3/5 as a fraction

Add 18/21 and 63/5

1^st number: 18/21, 2^nd number: 12 3/5

18/21 + 63/5 is 471/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
18/21 = 18 × 5/21 × 5 = 90/105
Likewise, for the 2nd fraction, since 5 × 21 = 105,
63/5 = 63 × 21/5 × 21 = 1323/105
Add the two like fractions:
90/105 + 1323/105 = 90 + 1323/105 = 1413/105
1413/105 simplified gives 471/35
So, 18/21 + 63/5 = 471/35
In mixed form: 1316/35

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