Add 30/81 and 9/20
30/81 + 9/20 is 443/540.
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,
30/81 = 30 × 20/81 × 20 = 600/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
9/20 = 9 × 81/20 × 81 = 729/1620 - Add the two like fractions:
600/1620 + 729/1620 = 600 + 729/1620 = 1329/1620 - 1329/1620 simplified gives 443/540
- So, 30/81 + 9/20 = 443/540
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