Add 12/15 and 21/7
1st number: 12/15, 2nd number: 3 0/7
12/15 + 21/7 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
12/15 = 12 × 7/15 × 7 = 84/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
21/7 = 21 × 15/7 × 15 = 315/105 - Add the two like fractions:
84/105 + 315/105 = 84 + 315/105 = 399/105 - 399/105 simplified gives 19/5
- So, 12/15 + 21/7 = 19/5
In mixed form: 34/5
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