Add 81/5 and 21/9
1st number: 16 1/5, 2nd number: 2 3/9
81/5 + 21/9 is 278/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
81/5 = 81 × 9/5 × 9 = 729/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Add the two like fractions:
729/45 + 105/45 = 729 + 105/45 = 834/45 - 834/45 simplified gives 278/15
- So, 81/5 + 21/9 = 278/15
In mixed form: 188/15
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