Add 9/21 and 1/7
9/21 + 1/7 is 4/7.
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,
1/7 = 1 × 3/7 × 3 = 3/21 - Add the two like fractions:
9/21 + 3/21 = 9 + 3/21 = 12/21 - 12/21 simplified gives 4/7
- So, 9/21 + 1/7 = 4/7
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