Answers

Subtract 72/7 from 20/3

1^st number: 6 2/3, 2^nd number: 10 2/7

20/3 - 72/7 is -76/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 7 is 21
   
   Next, find the equivalent fraction of both fractional numbers with denominator 21
2. For the 1st fraction, since 3 × 7 = 21,
   20/3 = 20 × 7/3 × 7 = 140/21
3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
   72/7 = 72 × 3/7 × 3 = 216/21
4. Subtract the two like fractions:
   140/21 - 216/21 = 140 - 216/21 = -76/21

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