Answers

Subtract 40/20 from 9/18

1^st number: 9/18, 2^nd number: 2 0/20

9/18 - 40/20 is -3/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 18 × 10 = 180,
   9/18 = 9 × 10/18 × 10 = 90/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   40/20 = 40 × 9/20 × 9 = 360/180
4. Subtract the two like fractions:
   90/180 - 360/180 = 90 - 360/180 = -270/180
5. After reducing the fraction, the answer is -3/2

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