Answers

Subtract 40/80 from 20/54

20/54 - 40/80 is -7/54.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 80 is 2160
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2160
2. For the 1st fraction, since 54 × 40 = 2160,
   20/54 = 20 × 40/54 × 40 = 800/2160
3. Likewise, for the 2nd fraction, since 80 × 27 = 2160,
   40/80 = 40 × 27/80 × 27 = 1080/2160
4. Subtract the two like fractions:
   800/2160 - 1080/2160 = 800 - 1080/2160 = -280/2160
5. After reducing the fraction, the answer is -7/54

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