Answers

Subtract 21/32 from 8/42

8/42 - 21/32 is -313/672.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 32 is 672
   
   Next, find the equivalent fraction of both fractional numbers with denominator 672
2. For the 1st fraction, since 42 × 16 = 672,
   8/42 = 8 × 16/42 × 16 = 128/672
3. Likewise, for the 2nd fraction, since 32 × 21 = 672,
   21/32 = 21 × 21/32 × 21 = 441/672
4. Subtract the two like fractions:
   128/672 - 441/672 = 128 - 441/672 = -313/672

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