Add 7/81 and 18/30
7/81 + 18/30 is 278/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
18/30 = 18 × 27/30 × 27 = 486/810 - Add the two like fractions:
70/810 + 486/810 = 70 + 486/810 = 556/810 - 556/810 simplified gives 278/405
- So, 7/81 + 18/30 = 278/405
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