Add 7/28 and 7/81
7/28 + 7/81 is 109/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
7/28 = 7 × 81/28 × 81 = 567/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
7/81 = 7 × 28/81 × 28 = 196/2268 - Add the two like fractions:
567/2268 + 196/2268 = 567 + 196/2268 = 763/2268 - 763/2268 simplified gives 109/324
- So, 7/28 + 7/81 = 109/324
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