Answers

Subtract 1/63 from 20/75

20/75 - 1/63 is 79/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 63 is 1575
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1575
2. For the 1st fraction, since 75 × 21 = 1575,
   20/75 = 20 × 21/75 × 21 = 420/1575
3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
   1/63 = 1 × 25/63 × 25 = 25/1575
4. Subtract the two like fractions:
   420/1575 - 25/1575 = 420 - 25/1575 = 395/1575
5. After reducing the fraction, the answer is 79/315

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