Add 15/20 and 81/80
1st number: 15/20, 2nd number: 1 1/80
15/20 + 81/80 is 141/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
15/20 = 15 × 4/20 × 4 = 60/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
81/80 = 81 × 1/80 × 1 = 81/80 - Add the two like fractions:
60/80 + 81/80 = 60 + 81/80 = 141/80 - So, 15/20 + 81/80 = 141/80
In mixed form: 161/80
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