Answers

Subtract 81/32 from 1/21

1^st number: 1/21, 2^nd number: 2 17/32

1/21 - 81/32 is -1669/672.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 32 is 672
   
   Next, find the equivalent fraction of both fractional numbers with denominator 672
2. For the 1st fraction, since 21 × 32 = 672,
   1/21 = 1 × 32/21 × 32 = 32/672
3. Likewise, for the 2nd fraction, since 32 × 21 = 672,
   81/32 = 81 × 21/32 × 21 = 1701/672
4. Subtract the two like fractions:
   32/672 - 1701/672 = 32 - 1701/672 = -1669/672

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