Add 9/21 and 5/7
9/21 + 5/7 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
9/21 = 9 × 1/21 × 1 = 9/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
5/7 = 5 × 3/7 × 3 = 15/21 - Add the two like fractions:
9/21 + 15/21 = 9 + 15/21 = 24/21 - 24/21 simplified gives 8/7
- So, 9/21 + 5/7 = 8/7
In mixed form: 11/7
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