Add 1/81 and 20/72
1/81 + 20/72 is 47/162.
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,
1/81 = 1 × 8/81 × 8 = 8/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
20/72 = 20 × 9/72 × 9 = 180/648 - Add the two like fractions:
8/648 + 180/648 = 8 + 180/648 = 188/648 - 188/648 simplified gives 47/162
- So, 1/81 + 20/72 = 47/162
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