Answers

Subtract 21/56 from 8/84

8/84 - 21/56 is -47/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 56 is 168
2. For the 1st fraction, since 84 × 2 = 168,
   8/84 = 8 × 2/84 × 2 = 16/168
3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
   21/56 = 21 × 3/56 × 3 = 63/168
4. Subtract the two fractions:
   16/168 - 63/168 = 16 - 63/168 = -47/168

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