Answers

Subtract 9/20 from 6/28

6/28 - 9/20 is -33/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   6/28 = 6 × 5/28 × 5 = 30/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   9/20 = 9 × 7/20 × 7 = 63/140
4. Subtract the two like fractions:
   30/140 - 63/140 = 30 - 63/140 = -33/140

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