Add 12/16 and 25/21, Solve 12/16 + 1 4/21 as a fraction

Add 12/16 and 25/21

1^st number: 12/16, 2^nd number: 1 4/21

12/16 + 25/21 is 163/84.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 16 × 21 = 336,
12/16 = 12 × 21/16 × 21 = 252/336
Likewise, for the 2nd fraction, since 21 × 16 = 336,
25/21 = 25 × 16/21 × 16 = 400/336
Add the two like fractions:
252/336 + 400/336 = 252 + 400/336 = 652/336
652/336 simplified gives 163/84
So, 12/16 + 25/21 = 163/84
In mixed form: 179/84

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