Add 18/15 and 9/12
1st number: 1 3/15, 2nd number: 9/12
18/15 + 9/12 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60 - Add the two like fractions:
72/60 + 45/60 = 72 + 45/60 = 117/60 - 117/60 simplified gives 39/20
- So, 18/15 + 9/12 = 39/20
In mixed form: 119/20
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