Answers

Subtract 63/40 from 21/25

1^st number: 21/25, 2^nd number: 1 23/40

21/25 - 63/40 is -147/200.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 40 is 200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 200
2. For the 1st fraction, since 25 × 8 = 200,
   21/25 = 21 × 8/25 × 8 = 168/200
3. Likewise, for the 2nd fraction, since 40 × 5 = 200,
   63/40 = 63 × 5/40 × 5 = 315/200
4. Subtract the two like fractions:
   168/200 - 315/200 = 168 - 315/200 = -147/200

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