Answers

Subtract 20/63 from 42/50

42/50 - 20/63 is 823/1575.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 63 is 3150
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3150
2. For the 1st fraction, since 50 × 63 = 3150,
   42/50 = 42 × 63/50 × 63 = 2646/3150
3. Likewise, for the 2nd fraction, since 63 × 50 = 3150,
   20/63 = 20 × 50/63 × 50 = 1000/3150
4. Subtract the two like fractions:
   2646/3150 - 1000/3150 = 2646 - 1000/3150 = 1646/3150
5. After reducing the fraction, the answer is 823/1575

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