Add 12/14 and 18/21
12/14 + 18/21 is 12/7.
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,
18/21 = 18 × 2/21 × 2 = 36/42 - Add the two like fractions:
36/42 + 36/42 = 36 + 36/42 = 72/42 - 72/42 simplified gives 12/7
- So, 12/14 + 18/21 = 12/7
In mixed form: 15/7
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