Subtract 72/12 from 6/21
1st number: 6/21, 2nd number: 6 0/12
6/21 - 72/12 is -40/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
72/12 = 72 × 7/12 × 7 = 504/84 - Subtract the two like fractions:
24/84 - 504/84 = 24 - 504/84 = -480/84 - After reducing the fraction, the answer is -40/7
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