Add 9/12 and 15/20
9/12 + 15/20 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Add the two like fractions:
45/60 + 45/60 = 45 + 45/60 = 90/60 - 90/60 simplified gives 3/2
- So, 9/12 + 15/20 = 3/2
In mixed form: 11/2
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