Add 21/3 and 12/9
1st number: 7 0/3, 2nd number: 1 3/9
21/3 + 12/9 is 25/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 9 is 9
Next, find the equivalent fraction of both fractional numbers with denominator 9 - For the 1st fraction, since 3 × 3 = 9,
21/3 = 21 × 3/3 × 3 = 63/9 - Likewise, for the 2nd fraction, since 9 × 1 = 9,
12/9 = 12 × 1/9 × 1 = 12/9 - Add the two like fractions:
63/9 + 12/9 = 63 + 12/9 = 75/9 - 75/9 simplified gives 25/3
- So, 21/3 + 12/9 = 25/3
In mixed form: 81/3
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