Add 81/54 and 2/21
1st number: 1 27/54, 2nd number: 2/21
81/54 + 2/21 is 67/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 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 21 × 18 = 378,
2/21 = 2 × 18/21 × 18 = 36/378 - Add the two like fractions:
567/378 + 36/378 = 567 + 36/378 = 603/378 - 603/378 simplified gives 67/42
- So, 81/54 + 2/21 = 67/42
In mixed form: 125/42
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