Answers

Subtract 27/40 from 10/20

10/20 - 27/40 is -7/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 40 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 20 × 2 = 40,
   10/20 = 10 × 2/20 × 2 = 20/40
3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
   27/40 = 27 × 1/40 × 1 = 27/40
4. Subtract the two like fractions:
   20/40 - 27/40 = 20 - 27/40 = -7/40

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