Add 72/9 and 9/21
1st number: 8 0/9, 2nd number: 9/21
72/9 + 9/21 is 59/7.
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,
72/9 = 72 × 7/9 × 7 = 504/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
9/21 = 9 × 3/21 × 3 = 27/63 - Add the two like fractions:
504/63 + 27/63 = 504 + 27/63 = 531/63 - 531/63 simplified gives 59/7
- So, 72/9 + 9/21 = 59/7
In mixed form: 83/7
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