Answers

Subtract 90/6 from 72/20

1^st number: 3 12/20, 2^nd number: 15 0/6

72/20 - 90/6 is -57/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 6 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 20 × 3 = 60,
   72/20 = 72 × 3/20 × 3 = 216/60
3. Likewise, for the 2nd fraction, since 6 × 10 = 60,
   90/6 = 90 × 10/6 × 10 = 900/60
4. Subtract the two like fractions:
   216/60 - 900/60 = 216 - 900/60 = -684/60
5. After reducing the fraction, the answer is -57/5

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