Add 21/12 and 45/3
1st number: 1 9/12, 2nd number: 15 0/3
21/12 + 45/3 is 67/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 3 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Likewise, for the 2nd fraction, since 3 × 4 = 12,
45/3 = 45 × 4/3 × 4 = 180/12 - Add the two like fractions:
21/12 + 180/12 = 21 + 180/12 = 201/12 - 201/12 simplified gives 67/4
- So, 21/12 + 45/3 = 67/4
In mixed form: 163/4
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