Answers

Subtract 16/45 from 21/16

1^st number: 1 5/16, 2^nd number: 16/45

21/16 - 16/45 is 689/720.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 45 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 16 × 45 = 720,
   21/16 = 21 × 45/16 × 45 = 945/720
3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
   16/45 = 16 × 16/45 × 16 = 256/720
4. Subtract the two like fractions:
   945/720 - 256/720 = 945 - 256/720 = 689/720

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