Add 72/7 and 84/9
1st number: 10 2/7, 2nd number: 9 3/9
72/7 + 84/9 is 412/21.
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,
72/7 = 72 × 9/7 × 9 = 648/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
84/9 = 84 × 7/9 × 7 = 588/63 - Add the two like fractions:
648/63 + 588/63 = 648 + 588/63 = 1236/63 - 1236/63 simplified gives 412/21
- So, 72/7 + 84/9 = 412/21
In mixed form: 1913/21
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