Add 27/9 and 30/21
1st number: 3 0/9, 2nd number: 1 9/21
27/9 + 30/21 is 31/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
27/9 = 27 × 7/9 × 7 = 189/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Add the two like fractions:
189/63 + 90/63 = 189 + 90/63 = 279/63 - 279/63 simplified gives 31/7
- So, 27/9 + 30/21 = 31/7
In mixed form: 43/7
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