Add 81/54 and 20/42
1st number: 1 27/54, 2nd number: 20/42
81/54 + 20/42 is 83/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
81/54 = 81 × 7/54 × 7 = 567/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Add the two like fractions:
567/378 + 180/378 = 567 + 180/378 = 747/378 - 747/378 simplified gives 83/42
- So, 81/54 + 20/42 = 83/42
In mixed form: 141/42
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