Add 15/7 and 12/9
1st number: 2 1/7, 2nd number: 1 3/9
15/7 + 12/9 is 73/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
15/7 = 15 × 9/7 × 9 = 135/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Add the two like fractions:
135/63 + 84/63 = 135 + 84/63 = 219/63 - 219/63 simplified gives 73/21
- So, 15/7 + 12/9 = 73/21
In mixed form: 310/21
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