Add 21/20 and 9/16
1st number: 1 1/20, 2nd number: 9/16
21/20 + 9/16 is 129/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
21/20 = 21 × 4/20 × 4 = 84/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
9/16 = 9 × 5/16 × 5 = 45/80 - Add the two like fractions:
84/80 + 45/80 = 84 + 45/80 = 129/80 - So, 21/20 + 9/16 = 129/80
In mixed form: 149/80
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