Answers

Subtract 15/42 from 20/96

20/96 - 15/42 is -25/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 96 and 42 is 672
   
   Next, find the equivalent fraction of both fractional numbers with denominator 672
2. For the 1st fraction, since 96 × 7 = 672,
   20/96 = 20 × 7/96 × 7 = 140/672
3. Likewise, for the 2nd fraction, since 42 × 16 = 672,
   15/42 = 15 × 16/42 × 16 = 240/672
4. Subtract the two like fractions:
   140/672 - 240/672 = 140 - 240/672 = -100/672
5. After reducing the fraction, the answer is -25/168

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