Add 21/84 and 30/9
1st number: 21/84, 2nd number: 3 3/9
21/84 + 30/9 is 43/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
21/84 = 21 × 3/84 × 3 = 63/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
30/9 = 30 × 28/9 × 28 = 840/252 - Add the two like fractions:
63/252 + 840/252 = 63 + 840/252 = 903/252 - 903/252 simplified gives 43/12
- So, 21/84 + 30/9 = 43/12
In mixed form: 37/12
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