Add 25/2 and 42/21, Solve 12 1/2 + 2 0/21 as a fraction

Add 25/2 and 42/21

1^st number: 12 1/2, 2^nd number: 2 0/21

25/2 + 42/21 is 29/2.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 2 × 21 = 42,
25/2 = 25 × 21/2 × 21 = 525/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
42/21 = 42 × 2/21 × 2 = 84/42
Add the two like fractions:
525/42 + 84/42 = 525 + 84/42 = 609/42
609/42 simplified gives 29/2
So, 25/2 + 42/21 = 29/2
In mixed form: 141/2

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