Add 18/21 and 9/14
18/21 + 9/14 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
9/14 = 9 × 3/14 × 3 = 27/42 - Add the two like fractions:
36/42 + 27/42 = 36 + 27/42 = 63/42 - 63/42 simplified gives 3/2
- So, 18/21 + 9/14 = 3/2
In mixed form: 11/2
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