Answers

Subtract 1/80 from 70/20

1^st number: 3 10/20, 2^nd number: 1/80

70/20 - 1/80 is 279/80.

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,
   70/20 = 70 × 4/20 × 4 = 280/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   1/80 = 1 × 1/80 × 1 = 1/80
4. Subtract the two like fractions:
   280/80 - 1/80 = 280 - 1/80 = 279/80
5. In mixed form: 339/80

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