Add 81/21 and 4/54
1st number: 3 18/21, 2nd number: 4/54
81/21 + 4/54 is 743/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
81/21 = 81 × 18/21 × 18 = 1458/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
4/54 = 4 × 7/54 × 7 = 28/378 - Add the two like fractions:
1458/378 + 28/378 = 1458 + 28/378 = 1486/378 - 1486/378 simplified gives 743/189
- So, 81/21 + 4/54 = 743/189
In mixed form: 3176/189
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