Subtract 84/36 from 9/21
1st number: 9/21, 2nd number: 2 12/36
9/21 - 84/36 is -40/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
9/21 = 9 × 12/21 × 12 = 108/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
84/36 = 84 × 7/36 × 7 = 588/252 - Subtract the two like fractions:
108/252 - 588/252 = 108 - 588/252 = -480/252 - After reducing the fraction, the answer is -40/21
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