Add 81/42 and 20/7
1st number: 1 39/42, 2nd number: 2 6/7
81/42 + 20/7 is 67/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
81/42 = 81 × 1/42 × 1 = 81/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
20/7 = 20 × 6/7 × 6 = 120/42 - Add the two like fractions:
81/42 + 120/42 = 81 + 120/42 = 201/42 - 201/42 simplified gives 67/14
- So, 81/42 + 20/7 = 67/14
In mixed form: 411/14
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