Answers

Subtract 49/20 from 21/36

1^st number: 21/36, 2^nd number: 2 9/20

21/36 - 49/20 is -28/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 36 × 5 = 180,
   21/36 = 21 × 5/36 × 5 = 105/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   49/20 = 49 × 9/20 × 9 = 441/180
4. Subtract the two like fractions:
   105/180 - 441/180 = 105 - 441/180 = -336/180
5. After reducing the fraction, the answer is -28/15

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