Subtract 4/7 from 5/21
5/21 - 4/7 is -1/3.
Steps for subtracting 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,
5/21 = 5 × 1/21 × 1 = 5/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
4/7 = 4 × 3/7 × 3 = 12/21 - Subtract the two like fractions:
5/21 - 12/21 = 5 - 12/21 = -7/21 - After reducing the fraction, the answer is -1/3
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