Answers

Subtract 21/16 from 4/7

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

4/7 - 21/16 is -83/112.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 16 is 112
   
   Next, find the equivalent fraction of both fractional numbers with denominator 112
2. For the 1st fraction, since 7 × 16 = 112,
   4/7 = 4 × 16/7 × 16 = 64/112
3. Likewise, for the 2nd fraction, since 16 × 7 = 112,
   21/16 = 21 × 7/16 × 7 = 147/112
4. Subtract the two like fractions:
   64/112 - 147/112 = 64 - 147/112 = -83/112

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