Add 7/30 and 20/81
7/30 + 20/81 is 389/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
7/30 = 7 × 27/30 × 27 = 189/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
20/81 = 20 × 10/81 × 10 = 200/810 - Add the two like fractions:
189/810 + 200/810 = 189 + 200/810 = 389/810 - So, 7/30 + 20/81 = 389/810
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