Answers

Subtract 49/20 from 21/49

1^st number: 21/49, 2^nd number: 2 9/20

21/49 - 49/20 is -283/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 20 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 49 × 20 = 980,
   21/49 = 21 × 20/49 × 20 = 420/980
3. Likewise, for the 2nd fraction, since 20 × 49 = 980,
   49/20 = 49 × 49/20 × 49 = 2401/980
4. Subtract the two like fractions:
   420/980 - 2401/980 = 420 - 2401/980 = -1981/980
5. After reducing the fraction, the answer is -283/140

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