Answers

Subtract 50/63 from 20/45

20/45 - 50/63 is -22/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   20/45 = 20 × 7/45 × 7 = 140/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   50/63 = 50 × 5/63 × 5 = 250/315
4. Subtract the two like fractions:
   140/315 - 250/315 = 140 - 250/315 = -110/315
5. After reducing the fraction, the answer is -22/63

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