Answers

Subtract 25/7 from 21/16

1^st number: 1 5/16, 2^nd number: 3 4/7

21/16 - 25/7 is -253/112.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 7 is 112
   
   Next, find the equivalent fraction of both fractional numbers with denominator 112
2. For the 1st fraction, since 16 × 7 = 112,
   21/16 = 21 × 7/16 × 7 = 147/112
3. Likewise, for the 2nd fraction, since 7 × 16 = 112,
   25/7 = 25 × 16/7 × 16 = 400/112
4. Subtract the two like fractions:
   147/112 - 400/112 = 147 - 400/112 = -253/112

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