Add 45/12 and 21/5
1st number: 3 9/12, 2nd number: 4 1/5
45/12 + 21/5 is 159/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 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 5 × 12 = 60,
21/5 = 21 × 12/5 × 12 = 252/60 - Add the two like fractions:
225/60 + 252/60 = 225 + 252/60 = 477/60 - 477/60 simplified gives 159/20
- So, 45/12 + 21/5 = 159/20
In mixed form: 719/20
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