Answers

Subtract 40/63 from 42/25

1^st number: 1 17/25, 2^nd number: 40/63

42/25 - 40/63 is 1646/1575.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 63 is 1575
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1575
2. For the 1st fraction, since 25 × 63 = 1575,
   42/25 = 42 × 63/25 × 63 = 2646/1575
3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
   40/63 = 40 × 25/63 × 25 = 1000/1575
4. Subtract the two like fractions:
   2646/1575 - 1000/1575 = 2646 - 1000/1575 = 1646/1575
5. In mixed form: 171/1575

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