Answers

Subtract 9/4 from 12/80

1^st number: 12/80, 2^nd number: 2 1/4

12/80 - 9/4 is -21/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 4 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   12/80 = 12 × 1/80 × 1 = 12/80
3. Likewise, for the 2nd fraction, since 4 × 20 = 80,
   9/4 = 9 × 20/4 × 20 = 180/80
4. Subtract the two like fractions:
   12/80 - 180/80 = 12 - 180/80 = -168/80
5. After reducing the fraction, the answer is -21/10

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