Add 81/12 and 42/30
1st number: 6 9/12, 2nd number: 1 12/30
81/12 + 42/30 is 163/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
42/30 = 42 × 2/30 × 2 = 84/60 - Add the two like fractions:
405/60 + 84/60 = 405 + 84/60 = 489/60 - 489/60 simplified gives 163/20
- So, 81/12 + 42/30 = 163/20
In mixed form: 83/20
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