Add 42/63 and 28/81
42/63 + 28/81 is 82/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
42/63 = 42 × 9/63 × 9 = 378/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
28/81 = 28 × 7/81 × 7 = 196/567 - Add the two like fractions:
378/567 + 196/567 = 378 + 196/567 = 574/567 - 574/567 simplified gives 82/81
- So, 42/63 + 28/81 = 82/81
In mixed form: 11/81
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