Add 21/12 and 30/45
1st number: 1 9/12, 2nd number: 30/45
21/12 + 30/45 is 29/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
30/45 = 30 × 4/45 × 4 = 120/180 - Add the two like fractions:
315/180 + 120/180 = 315 + 120/180 = 435/180 - 435/180 simplified gives 29/12
- So, 21/12 + 30/45 = 29/12
In mixed form: 25/12
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