Add 12/10 and 21/63, Solve 1 2/10 + 21/63 as a fraction

Add 12/10 and 21/63

1^st number: 1 2/10, 2^nd number: 21/63

12/10 + 21/63 is 23/15.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 10 × 63 = 630,
12/10 = 12 × 63/10 × 63 = 756/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630
Add the two like fractions:
756/630 + 210/630 = 756 + 210/630 = 966/630
966/630 simplified gives 23/15
So, 12/10 + 21/63 = 23/15
In mixed form: 18/15

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