Add 81/42 and 7/54
1st number: 1 39/42, 2nd number: 7/54
81/42 + 7/54 is 389/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
81/42 = 81 × 9/42 × 9 = 729/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378 - Add the two like fractions:
729/378 + 49/378 = 729 + 49/378 = 778/378 - 778/378 simplified gives 389/189
- So, 81/42 + 7/54 = 389/189
In mixed form: 211/189
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