Add 81/12 and 42/7
1st number: 6 9/12, 2nd number: 6 0/7
81/12 + 42/7 is 51/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
81/12 = 81 × 7/12 × 7 = 567/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
42/7 = 42 × 12/7 × 12 = 504/84 - Add the two like fractions:
567/84 + 504/84 = 567 + 504/84 = 1071/84 - 1071/84 simplified gives 51/4
- So, 81/12 + 42/7 = 51/4
In mixed form: 123/4
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