Add 21/4 and 27/12
1st number: 5 1/4, 2nd number: 2 3/12
21/4 + 27/12 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
27/12 = 27 × 1/12 × 1 = 27/12 - Add the two like fractions:
63/12 + 27/12 = 63 + 27/12 = 90/12 - 90/12 simplified gives 15/2
- So, 21/4 + 27/12 = 15/2
In mixed form: 71/2
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