Subtract 5/21 from 12/28
12/28 - 5/21 is 4/21.
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,
12/28 = 12 × 3/28 × 3 = 36/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Subtract the two like fractions:
36/84 - 20/84 = 36 - 20/84 = 16/84 - After reducing the fraction, the answer is 4/21
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