Subtract 9/21 from 6/28
6/28 - 9/21 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
6/28 = 6 × 3/28 × 3 = 18/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Subtract the two like fractions:
18/84 - 36/84 = 18 - 36/84 = -18/84 - After reducing the fraction, the answer is -3/14
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