Answers

Subtract 45/7 from 36/20

1^st number: 1 16/20, 2^nd number: 6 3/7

36/20 - 45/7 is -162/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 7 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   36/20 = 36 × 7/20 × 7 = 252/140
3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
   45/7 = 45 × 20/7 × 20 = 900/140
4. Subtract the two like fractions:
   252/140 - 900/140 = 252 - 900/140 = -648/140
5. After reducing the fraction, the answer is -162/35

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