Add 81/4 and 81/5
1st number: 20 1/4, 2nd number: 16 1/5
81/4 + 81/5 is 729/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
81/4 = 81 × 5/4 × 5 = 405/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
81/5 = 81 × 4/5 × 4 = 324/20 - Add the two like fractions:
405/20 + 324/20 = 405 + 324/20 = 729/20 - So, 81/4 + 81/5 = 729/20
In mixed form: 369/20
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