Answers

Subtract 45/4 from 8/21

1^st number: 8/21, 2^nd number: 11 1/4

8/21 - 45/4 is -913/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   8/21 = 8 × 4/21 × 4 = 32/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   45/4 = 45 × 21/4 × 21 = 945/84
4. Subtract the two like fractions:
   32/84 - 945/84 = 32 - 945/84 = -913/84

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