Add 72/15 and 81/12
1st number: 4 12/15, 2nd number: 6 9/12
72/15 + 81/12 is 231/20.
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,
72/15 = 72 × 4/15 × 4 = 288/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Add the two like fractions:
288/60 + 405/60 = 288 + 405/60 = 693/60 - 693/60 simplified gives 231/20
- So, 72/15 + 81/12 = 231/20
In mixed form: 1111/20
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