Subtract 1/7 from 3/9
3/9 - 1/7 is 4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
3/9 = 3 × 7/9 × 7 = 21/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
1/7 = 1 × 9/7 × 9 = 9/63 - Subtract the two like fractions:
21/63 - 9/63 = 21 - 9/63 = 12/63 - After reducing the fraction, the answer is 4/21
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