Answers

Subtract 16/9 from 21/60

1^st number: 21/60, 2^nd number: 1 7/9

21/60 - 16/9 is -257/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 9 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 60 × 3 = 180,
   21/60 = 21 × 3/60 × 3 = 63/180
3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
   16/9 = 16 × 20/9 × 20 = 320/180
4. Subtract the two like fractions:
   63/180 - 320/180 = 63 - 320/180 = -257/180

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