Add 28/9 and 81/20
1st number: 3 1/9, 2nd number: 4 1/20
28/9 + 81/20 is 1289/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
28/9 = 28 × 20/9 × 20 = 560/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Add the two like fractions:
560/180 + 729/180 = 560 + 729/180 = 1289/180 - So, 28/9 + 81/20 = 1289/180
In mixed form: 729/180
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