Add 42/12 and 90/81
1st number: 3 6/12, 2nd number: 1 9/81
42/12 + 90/81 is 83/18.
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,
42/12 = 42 × 27/12 × 27 = 1134/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
90/81 = 90 × 4/81 × 4 = 360/324 - Add the two like fractions:
1134/324 + 360/324 = 1134 + 360/324 = 1494/324 - 1494/324 simplified gives 83/18
- So, 42/12 + 90/81 = 83/18
In mixed form: 411/18
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