Add 45/12 and 21/30
1st number: 3 9/12, 2nd number: 21/30
45/12 + 21/30 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Add the two like fractions:
225/60 + 42/60 = 225 + 42/60 = 267/60 - 267/60 simplified gives 89/20
- So, 45/12 + 21/30 = 89/20
In mixed form: 49/20
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