Answers

Subtract 25/40 from 63/42

1^st number: 1 21/42, 2^nd number: 25/40

63/42 - 25/40 is 7/8.

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,
   63/42 = 63 × 20/42 × 20 = 1260/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   25/40 = 25 × 21/40 × 21 = 525/840
4. Subtract the two like fractions:
   1260/840 - 525/840 = 1260 - 525/840 = 735/840
5. After reducing the fraction, the answer is 7/8

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