Answers

Subtract 28/12 from 90/80

1^st number: 1 10/80, 2^nd number: 2 4/12

90/80 - 28/12 is -29/24.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 12 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 80 × 3 = 240,
   90/80 = 90 × 3/80 × 3 = 270/240
3. Likewise, for the 2nd fraction, since 12 × 20 = 240,
   28/12 = 28 × 20/12 × 20 = 560/240
4. Subtract the two like fractions:
   270/240 - 560/240 = 270 - 560/240 = -290/240
5. After reducing the fraction, the answer is -29/24

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