Answers

Subtract 40/49 from 20/63

20/63 - 40/49 is -220/441.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 49 is 441
   
   Next, find the equivalent fraction of both fractional numbers with denominator 441
2. For the 1st fraction, since 63 × 7 = 441,
   20/63 = 20 × 7/63 × 7 = 140/441
3. Likewise, for the 2nd fraction, since 49 × 9 = 441,
   40/49 = 40 × 9/49 × 9 = 360/441
4. Subtract the two like fractions:
   140/441 - 360/441 = 140 - 360/441 = -220/441

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