Subtract 84/72 from 8/21
1st number: 8/21, 2nd number: 1 12/72
8/21 - 84/72 is -11/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
8/21 = 8 × 24/21 × 24 = 192/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
84/72 = 84 × 7/72 × 7 = 588/504 - Subtract the two like fractions:
192/504 - 588/504 = 192 - 588/504 = -396/504 - After reducing the fraction, the answer is -11/14
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