Answers

Subtract 63/8 from 54/20

1^st number: 2 14/20, 2^nd number: 7 7/8

54/20 - 63/8 is -207/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 8 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 20 × 2 = 40,
   54/20 = 54 × 2/20 × 2 = 108/40
3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
   63/8 = 63 × 5/8 × 5 = 315/40
4. Subtract the two like fractions:
   108/40 - 315/40 = 108 - 315/40 = -207/40

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