Answers

Subtract 45/15 from 9/20

1^st number: 9/20, 2^nd number: 3 0/15

9/20 - 45/15 is -51/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 15 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 20 × 3 = 60,
   9/20 = 9 × 3/20 × 3 = 27/60
3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
   45/15 = 45 × 4/15 × 4 = 180/60
4. Subtract the two like fractions:
   27/60 - 180/60 = 27 - 180/60 = -153/60
5. After reducing the fraction, the answer is -51/20

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