Add 20/81 and 18/5
1st number: 20/81, 2nd number: 3 3/5
20/81 + 18/5 is 1558/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 5 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
20/81 = 20 × 5/81 × 5 = 100/405 - Likewise, for the 2nd fraction, since 5 × 81 = 405,
18/5 = 18 × 81/5 × 81 = 1458/405 - Add the two like fractions:
100/405 + 1458/405 = 100 + 1458/405 = 1558/405 - So, 20/81 + 18/5 = 1558/405
In mixed form: 3343/405
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