Answers

Subtract 45/20 from 21/60

1^st number: 21/60, 2^nd number: 2 5/20

21/60 - 45/20 is -19/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 60 × 1 = 60,
   21/60 = 21 × 1/60 × 1 = 21/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   45/20 = 45 × 3/20 × 3 = 135/60
4. Subtract the two like fractions:
   21/60 - 135/60 = 21 - 135/60 = -114/60
5. After reducing the fraction, the answer is -19/10

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