Add 21/9 and 20/80
1st number: 2 3/9, 2nd number: 20/80
21/9 + 20/80 is 31/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
21/9 = 21 × 80/9 × 80 = 1680/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720 - Add the two like fractions:
1680/720 + 180/720 = 1680 + 180/720 = 1860/720 - 1860/720 simplified gives 31/12
- So, 21/9 + 20/80 = 31/12
In mixed form: 27/12
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