Add 81/12 and 70/15
1st number: 6 9/12, 2nd number: 4 10/15
81/12 + 70/15 is 137/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
70/15 = 70 × 4/15 × 4 = 280/60 - Add the two like fractions:
405/60 + 280/60 = 405 + 280/60 = 685/60 - 685/60 simplified gives 137/12
- So, 81/12 + 70/15 = 137/12
In mixed form: 115/12
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