Subtract 20/84 from 72/54
1st number: 1 18/54, 2nd number: 20/84
72/54 - 20/84 is 23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 54 × 14 = 756,
72/54 = 72 × 14/54 × 14 = 1008/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
20/84 = 20 × 9/84 × 9 = 180/756 - Subtract the two like fractions:
1008/756 - 180/756 = 1008 - 180/756 = 828/756 - After reducing the fraction, the answer is 23/21
- In mixed form: 12/21
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