Add 18/20 and 30/81
18/20 + 30/81 is 343/270.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
18/20 = 18 × 81/20 × 81 = 1458/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
30/81 = 30 × 20/81 × 20 = 600/1620 - Add the two like fractions:
1458/1620 + 600/1620 = 1458 + 600/1620 = 2058/1620 - 2058/1620 simplified gives 343/270
- So, 18/20 + 30/81 = 343/270
In mixed form: 173/270
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