Answers

Subtract 63/40 from 5/42

1^st number: 5/42, 2^nd number: 1 23/40

5/42 - 63/40 is -1223/840.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   5/42 = 5 × 20/42 × 20 = 100/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   63/40 = 63 × 21/40 × 21 = 1323/840
4. Subtract the two like fractions:
   100/840 - 1323/840 = 100 - 1323/840 = -1223/840

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