Add 12/14 and 15/21
12/14 + 15/21 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
12/14 = 12 × 3/14 × 3 = 36/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Add the two like fractions:
36/42 + 30/42 = 36 + 30/42 = 66/42 - 66/42 simplified gives 11/7
- So, 12/14 + 15/21 = 11/7
In mixed form: 14/7
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