Add 8/7 and 21/9
1st number: 1 1/7, 2nd number: 2 3/9
8/7 + 21/9 is 73/21.
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,
8/7 = 8 × 9/7 × 9 = 72/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Add the two like fractions:
72/63 + 147/63 = 72 + 147/63 = 219/63 - 219/63 simplified gives 73/21
- So, 8/7 + 21/9 = 73/21
In mixed form: 310/21
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