Add 81/10 and 21/4
1st number: 8 1/10, 2nd number: 5 1/4
81/10 + 21/4 is 267/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
81/10 = 81 × 2/10 × 2 = 162/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
21/4 = 21 × 5/4 × 5 = 105/20 - Add the two like fractions:
162/20 + 105/20 = 162 + 105/20 = 267/20 - So, 81/10 + 21/4 = 267/20
In mixed form: 137/20
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