Add 54/18 and 81/42
1st number: 3 0/18, 2nd number: 1 39/42
54/18 + 81/42 is 69/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
54/18 = 54 × 7/18 × 7 = 378/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
81/42 = 81 × 3/42 × 3 = 243/126 - Add the two like fractions:
378/126 + 243/126 = 378 + 243/126 = 621/126 - 621/126 simplified gives 69/14
- So, 54/18 + 81/42 = 69/14
In mixed form: 413/14
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