Answers

Subtract 72/80 from 60/20

1^st number: 3 0/20, 2^nd number: 72/80

60/20 - 72/80 is 21/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   60/20 = 60 × 4/20 × 4 = 240/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   72/80 = 72 × 1/80 × 1 = 72/80
4. Subtract the two like fractions:
   240/80 - 72/80 = 240 - 72/80 = 168/80
5. After reducing the fraction, the answer is 21/10
6. In mixed form: 21/10

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