Answers

Subtract 25/45 from 21/48

21/48 - 25/45 is -17/144.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 48 and 45 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 48 × 15 = 720,
   21/48 = 21 × 15/48 × 15 = 315/720
3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
   25/45 = 25 × 16/45 × 16 = 400/720
4. Subtract the two like fractions:
   315/720 - 400/720 = 315 - 400/720 = -85/720
5. After reducing the fraction, the answer is -17/144

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