Subtract 12/21 from 2/28
2/28 - 12/21 is -1/2.
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,
2/28 = 2 × 3/28 × 3 = 6/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
12/21 = 12 × 4/21 × 4 = 48/84 - Subtract the two like fractions:
6/84 - 48/84 = 6 - 48/84 = -42/84 - After reducing the fraction, the answer is -1/2
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