Answers

Subtract 21/4 from 18/60

1^st number: 18/60, 2^nd number: 5 1/4

18/60 - 21/4 is -99/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 4 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 60 × 1 = 60,
   18/60 = 18 × 1/60 × 1 = 18/60
3. Likewise, for the 2nd fraction, since 4 × 15 = 60,
   21/4 = 21 × 15/4 × 15 = 315/60
4. Subtract the two like fractions:
   18/60 - 315/60 = 18 - 315/60 = -297/60
5. After reducing the fraction, the answer is -99/20

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