Answers

Subtract 9/15 from 9/20

9/20 - 9/15 is -3/20.

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,
   9/15 = 9 × 4/15 × 4 = 36/60
4. Subtract the two like fractions:
   27/60 - 36/60 = 27 - 36/60 = -9/60
5. After reducing the fraction, the answer is -3/20

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