Add 3/81 and 5/20
3/81 + 5/20 is 31/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
3/81 = 3 × 20/81 × 20 = 60/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
5/20 = 5 × 81/20 × 81 = 405/1620 - Add the two like fractions:
60/1620 + 405/1620 = 60 + 405/1620 = 465/1620 - 465/1620 simplified gives 31/108
- So, 3/81 + 5/20 = 31/108
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