Add 81/45 and 81/12
1st number: 1 36/45, 2nd number: 6 9/12
81/45 + 81/12 is 171/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
81/45 = 81 × 4/45 × 4 = 324/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
81/12 = 81 × 15/12 × 15 = 1215/180 - Add the two like fractions:
324/180 + 1215/180 = 324 + 1215/180 = 1539/180 - 1539/180 simplified gives 171/20
- So, 81/45 + 81/12 = 171/20
In mixed form: 811/20
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