Add 21/12 and 15/5
1st number: 1 9/12, 2nd number: 3 0/5
21/12 + 15/5 is 19/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
15/5 = 15 × 12/5 × 12 = 180/60 - Add the two like fractions:
105/60 + 180/60 = 105 + 180/60 = 285/60 - 285/60 simplified gives 19/4
- So, 21/12 + 15/5 = 19/4
In mixed form: 43/4
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