Answers

Subtract 20/21 from 5/16

5/16 - 20/21 is -215/336.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 21 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 16 × 21 = 336,
   5/16 = 5 × 21/16 × 21 = 105/336
3. Likewise, for the 2nd fraction, since 21 × 16 = 336,
   20/21 = 20 × 16/21 × 16 = 320/336
4. Subtract the two like fractions:
   105/336 - 320/336 = 105 - 320/336 = -215/336

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