Answers

Subtract 90/5 from 45/80

1^st number: 45/80, 2^nd number: 18 0/5

45/80 - 90/5 is -279/16.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 5 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
3. Likewise, for the 2nd fraction, since 5 × 16 = 80,
   90/5 = 90 × 16/5 × 16 = 1440/80
4. Subtract the two like fractions:
   45/80 - 1440/80 = 45 - 1440/80 = -1395/80
5. After reducing the fraction, the answer is -279/16

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