Answers

Subtract 81/49 from 16/20

1^st number: 16/20, 2^nd number: 1 32/49

16/20 - 81/49 is -209/245.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 49 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   16/20 = 16 × 49/20 × 49 = 784/980
3. Likewise, for the 2nd fraction, since 49 × 20 = 980,
   81/49 = 81 × 20/49 × 20 = 1620/980
4. Subtract the two like fractions:
   784/980 - 1620/980 = 784 - 1620/980 = -836/980
5. After reducing the fraction, the answer is -209/245

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