Answers

Subtract 21/30 from 2/63

2/63 - 21/30 is -421/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 30 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   2/63 = 2 × 10/63 × 10 = 20/630
3. Likewise, for the 2nd fraction, since 30 × 21 = 630,
   21/30 = 21 × 21/30 × 21 = 441/630
4. Subtract the two like fractions:
   20/630 - 441/630 = 20 - 441/630 = -421/630

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