Add 21/16 and 18/5
1st number: 1 5/16, 2nd number: 3 3/5
21/16 + 18/5 is 393/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
18/5 = 18 × 16/5 × 16 = 288/80 - Add the two like fractions:
105/80 + 288/80 = 105 + 288/80 = 393/80 - So, 21/16 + 18/5 = 393/80
In mixed form: 473/80
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