Add 42/81 and 18/12
1st number: 42/81, 2nd number: 1 6/12
42/81 + 18/12 is 109/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
42/81 = 42 × 4/81 × 4 = 168/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
18/12 = 18 × 27/12 × 27 = 486/324 - Add the two like fractions:
168/324 + 486/324 = 168 + 486/324 = 654/324 - 654/324 simplified gives 109/54
- So, 42/81 + 18/12 = 109/54
In mixed form: 21/54
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