Add 27/21 and 12/9
1st number: 1 6/21, 2nd number: 1 3/9
27/21 + 12/9 is 55/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
27/21 = 27 × 3/21 × 3 = 81/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Add the two like fractions:
81/63 + 84/63 = 81 + 84/63 = 165/63 - 165/63 simplified gives 55/21
- So, 27/21 + 12/9 = 55/21
In mixed form: 213/21
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