Add 21/9 and 30/20
1st number: 2 3/9, 2nd number: 1 10/20
21/9 + 30/20 is 23/6.
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,
21/9 = 21 × 20/9 × 20 = 420/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Add the two like fractions:
420/180 + 270/180 = 420 + 270/180 = 690/180 - 690/180 simplified gives 23/6
- So, 21/9 + 30/20 = 23/6
In mixed form: 35/6
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