Answers

Subtract 28/18 from 27/90

1^st number: 27/90, 2^nd number: 1 10/18

27/90 - 28/18 is -113/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 18 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   27/90 = 27 × 1/90 × 1 = 27/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   28/18 = 28 × 5/18 × 5 = 140/90
4. Subtract the two like fractions:
   27/90 - 140/90 = 27 - 140/90 = -113/90

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