Answers

Subtract 6/56 from 21/40

21/40 - 6/56 is 117/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   21/40 = 21 × 7/40 × 7 = 147/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   6/56 = 6 × 5/56 × 5 = 30/280
4. Subtract the two like fractions:
   147/280 - 30/280 = 147 - 30/280 = 117/280

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