Subtract 84/36 from 21/49
1st number: 21/49, 2nd number: 2 12/36
21/49 - 84/36 is -40/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 36 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 49 × 36 = 1764,
21/49 = 21 × 36/49 × 36 = 756/1764 - Likewise, for the 2nd fraction, since 36 × 49 = 1764,
84/36 = 84 × 49/36 × 49 = 4116/1764 - Subtract the two like fractions:
756/1764 - 4116/1764 = 756 - 4116/1764 = -3360/1764 - After reducing the fraction, the answer is -40/21
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