Answers

Subtract 27/20 from 7/18

1^st number: 7/18, 2^nd number: 1 7/20

7/18 - 27/20 is -173/180.

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,
   7/18 = 7 × 10/18 × 10 = 70/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   27/20 = 27 × 9/20 × 9 = 243/180
4. Subtract the two like fractions:
   70/180 - 243/180 = 70 - 243/180 = -173/180

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