Answers

Subtract 45/54 from 20/45

20/45 - 45/54 is -7/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 45 × 6 = 270,
   20/45 = 20 × 6/45 × 6 = 120/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   45/54 = 45 × 5/54 × 5 = 225/270
4. Subtract the two like fractions:
   120/270 - 225/270 = 120 - 225/270 = -105/270
5. After reducing the fraction, the answer is -7/18

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