Answers

Subtract 20/54 from 30/84

30/84 - 20/54 is -5/378.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 54 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   30/84 = 30 × 9/84 × 9 = 270/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   20/54 = 20 × 14/54 × 14 = 280/756
4. Subtract the two like fractions:
   270/756 - 280/756 = 270 - 280/756 = -10/756
5. After reducing the fraction, the answer is -5/378

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