Answers

Subtract 20/30 from 15/54

15/54 - 20/30 is -7/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 30 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 54 × 5 = 270,
   15/54 = 15 × 5/54 × 5 = 75/270
3. Likewise, for the 2nd fraction, since 30 × 9 = 270,
   20/30 = 20 × 9/30 × 9 = 180/270
4. Subtract the two like fractions:
   75/270 - 180/270 = 75 - 180/270 = -105/270
5. After reducing the fraction, the answer is -7/18

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