Add 21/18 and 28/9
1st number: 1 3/18, 2nd number: 3 1/9
21/18 + 28/9 is 77/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
28/9 = 28 × 2/9 × 2 = 56/18 - Add the two like fractions:
21/18 + 56/18 = 21 + 56/18 = 77/18 - So, 21/18 + 28/9 = 77/18
In mixed form: 45/18
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