Answers

Subtract 63/48 from 21/45

1^st number: 21/45, 2^nd number: 1 15/48

21/45 - 63/48 is -203/240.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 48 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 45 × 16 = 720,
   21/45 = 21 × 16/45 × 16 = 336/720
3. Likewise, for the 2nd fraction, since 48 × 15 = 720,
   63/48 = 63 × 15/48 × 15 = 945/720
4. Subtract the two like fractions:
   336/720 - 945/720 = 336 - 945/720 = -609/720
5. After reducing the fraction, the answer is -203/240

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