Add 90/27 and 81/42
1st number: 3 9/27, 2nd number: 1 39/42
90/27 + 81/42 is 221/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
90/27 = 90 × 14/27 × 14 = 1260/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
81/42 = 81 × 9/42 × 9 = 729/378 - Add the two like fractions:
1260/378 + 729/378 = 1260 + 729/378 = 1989/378 - 1989/378 simplified gives 221/42
- So, 90/27 + 81/42 = 221/42
In mixed form: 511/42
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