Add 12/21 and 25/9
1st number: 12/21, 2nd number: 2 7/9
12/21 + 25/9 is 211/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
25/9 = 25 × 7/9 × 7 = 175/63 - Add the two like fractions:
36/63 + 175/63 = 36 + 175/63 = 211/63 - So, 12/21 + 25/9 = 211/63
In mixed form: 322/63
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