Answers

Subtract 42/18 from 9/20

1^st number: 9/20, 2^nd number: 2 6/18

9/20 - 42/18 is -113/60.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 18 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   9/20 = 9 × 9/20 × 9 = 81/180
3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
   42/18 = 42 × 10/18 × 10 = 420/180
4. Subtract the two like fractions:
   81/180 - 420/180 = 81 - 420/180 = -339/180
5. After reducing the fraction, the answer is -113/60

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