Subtract 27/21 from 12/36
1st number: 12/36, 2nd number: 1 6/21
12/36 - 27/21 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
12/36 = 12 × 7/36 × 7 = 84/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
27/21 = 27 × 12/21 × 12 = 324/252 - Subtract the two like fractions:
84/252 - 324/252 = 84 - 324/252 = -240/252 - After reducing the fraction, the answer is -20/21
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