Answers

Subtract 81/40 from 80/12

1^st number: 6 8/12, 2^nd number: 2 1/40

80/12 - 81/40 is 557/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 12 × 10 = 120,
   80/12 = 80 × 10/12 × 10 = 800/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   81/40 = 81 × 3/40 × 3 = 243/120
4. Subtract the two like fractions:
   800/120 - 243/120 = 800 - 243/120 = 557/120
5. In mixed form: 477/120

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