Answers

Subtract 42/54 from 7/84

7/84 - 42/54 is -25/36.

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,
   7/84 = 7 × 9/84 × 9 = 63/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   42/54 = 42 × 14/54 × 14 = 588/756
4. Subtract the two like fractions:
   63/756 - 588/756 = 63 - 588/756 = -525/756
5. After reducing the fraction, the answer is -25/36

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