Subtract 3/9 from 2/7
2/7 - 3/9 is -1/21.
Steps for subtracting 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,
2/7 = 2 × 9/7 × 9 = 18/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
3/9 = 3 × 7/9 × 7 = 21/63 - Subtract the two like fractions:
18/63 - 21/63 = 18 - 21/63 = -3/63 - After reducing the fraction, the answer is -1/21
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