Add 21/12 and 20/5
1st number: 1 9/12, 2nd number: 4 0/5
21/12 + 20/5 is 23/4.
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,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
20/5 = 20 × 12/5 × 12 = 240/60 - Add the two like fractions:
105/60 + 240/60 = 105 + 240/60 = 345/60 - 345/60 simplified gives 23/4
- So, 21/12 + 20/5 = 23/4
In mixed form: 53/4
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