Answers

Subtract 40/21 from 30/63

1^st number: 30/63, 2^nd number: 1 19/21

30/63 - 40/21 is -10/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 63 × 1 = 63,
   30/63 = 30 × 1/63 × 1 = 30/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   40/21 = 40 × 3/21 × 3 = 120/63
4. Subtract the two like fractions:
   30/63 - 120/63 = 30 - 120/63 = -90/63
5. After reducing the fraction, the answer is -10/7

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