Add 81/7 and 20/9
1st number: 11 4/7, 2nd number: 2 2/9
81/7 + 20/9 is 869/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
20/9 = 20 × 7/9 × 7 = 140/63 - Add the two like fractions:
729/63 + 140/63 = 729 + 140/63 = 869/63 - So, 81/7 + 20/9 = 869/63
In mixed form: 1350/63
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