Add 30/81 and 20/72
30/81 + 20/72 is 35/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 72 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
30/81 = 30 × 8/81 × 8 = 240/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
20/72 = 20 × 9/72 × 9 = 180/648 - Add the two like fractions:
240/648 + 180/648 = 240 + 180/648 = 420/648 - 420/648 simplified gives 35/54
- So, 30/81 + 20/72 = 35/54
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