Add 9/12 and 42/81
9/12 + 42/81 is 137/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
9/12 = 9 × 27/12 × 27 = 243/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
42/81 = 42 × 4/81 × 4 = 168/324 - Add the two like fractions:
243/324 + 168/324 = 243 + 168/324 = 411/324 - 411/324 simplified gives 137/108
- So, 9/12 + 42/81 = 137/108
In mixed form: 129/108
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