Subtract 3/7 from 28/84
28/84 - 3/7 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
28/84 = 28 × 1/84 × 1 = 28/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
3/7 = 3 × 12/7 × 12 = 36/84 - Subtract the two like fractions:
28/84 - 36/84 = 28 - 36/84 = -8/84 - After reducing the fraction, the answer is -2/21
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