Subtract 12/9 from 20/84
1st number: 20/84, 2nd number: 1 3/9
20/84 - 12/9 is -23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
12/9 = 12 × 28/9 × 28 = 336/252 - Subtract the two like fractions:
60/252 - 336/252 = 60 - 336/252 = -276/252 - After reducing the fraction, the answer is -23/21
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