Subtract 25/84 from 8/21
8/21 - 25/84 is 1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
8/21 = 8 × 4/21 × 4 = 32/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
25/84 = 25 × 1/84 × 1 = 25/84 - Subtract the two like fractions:
32/84 - 25/84 = 32 - 25/84 = 7/84 - After reducing the fraction, the answer is 1/12
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