Answers

Subtract 42/25 from 21/16

1^st number: 1 5/16, 2^nd number: 1 17/25

21/16 - 42/25 is -147/400.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 25 is 400
   
   Next, find the equivalent fraction of both fractional numbers with denominator 400
2. For the 1st fraction, since 16 × 25 = 400,
   21/16 = 21 × 25/16 × 25 = 525/400
3. Likewise, for the 2nd fraction, since 25 × 16 = 400,
   42/25 = 42 × 16/25 × 16 = 672/400
4. Subtract the two like fractions:
   525/400 - 672/400 = 525 - 672/400 = -147/400

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