Answers

Subtract 45/80 from 28/20

1^st number: 1 8/20, 2^nd number: 45/80

28/20 - 45/80 is 67/80.

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,
   28/20 = 28 × 4/20 × 4 = 112/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Subtract the two like fractions:
   112/80 - 45/80 = 112 - 45/80 = 67/80

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