Add 28/81 and 40/49
28/81 + 40/49 is 4612/3969.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 49 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 81 × 49 = 3969,
28/81 = 28 × 49/81 × 49 = 1372/3969 - Likewise, for the 2nd fraction, since 49 × 81 = 3969,
40/49 = 40 × 81/49 × 81 = 3240/3969 - Add the two like fractions:
1372/3969 + 3240/3969 = 1372 + 3240/3969 = 4612/3969 - So, 28/81 + 40/49 = 4612/3969
In mixed form: 1643/3969
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