Answers

Subtract 60/20 from 16/21

1^st number: 16/21, 2^nd number: 3 0/20

16/21 - 60/20 is -47/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   16/21 = 16 × 20/21 × 20 = 320/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   60/20 = 60 × 21/20 × 21 = 1260/420
4. Subtract the two like fractions:
   320/420 - 1260/420 = 320 - 1260/420 = -940/420
5. After reducing the fraction, the answer is -47/21

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