Add 8/81 and 81/20
1st number: 8/81, 2nd number: 4 1/20
8/81 + 81/20 is 6721/1620.
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,
8/81 = 8 × 20/81 × 20 = 160/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
81/20 = 81 × 81/20 × 81 = 6561/1620 - Add the two like fractions:
160/1620 + 6561/1620 = 160 + 6561/1620 = 6721/1620 - So, 8/81 + 81/20 = 6721/1620
In mixed form: 4241/1620
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