Answers

Subtract 81/80 from 42/6

1^st number: 7 0/6, 2^nd number: 1 1/80

42/6 - 81/80 is 479/80.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 6 × 40 = 240,
   42/6 = 42 × 40/6 × 40 = 1680/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   81/80 = 81 × 3/80 × 3 = 243/240
4. Subtract the two like fractions:
   1680/240 - 243/240 = 1680 - 243/240 = 1437/240
5. After reducing the fraction, the answer is 479/80
6. In mixed form: 579/80

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