Add 18/45 and 81/12
1st number: 18/45, 2nd number: 6 9/12
18/45 + 81/12 is 143/20.
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,
18/45 = 18 × 4/45 × 4 = 72/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
81/12 = 81 × 15/12 × 15 = 1215/180 - Add the two like fractions:
72/180 + 1215/180 = 72 + 1215/180 = 1287/180 - 1287/180 simplified gives 143/20
- So, 18/45 + 81/12 = 143/20
In mixed form: 73/20
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