Add 12/9 and 21/4
1st number: 1 3/9, 2nd number: 5 1/4
12/9 + 21/4 is 79/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
12/9 = 12 × 4/9 × 4 = 48/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
21/4 = 21 × 9/4 × 9 = 189/36 - Add the two like fractions:
48/36 + 189/36 = 48 + 189/36 = 237/36 - 237/36 simplified gives 79/12
- So, 12/9 + 21/4 = 79/12
In mixed form: 67/12
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