Answers

Subtract 80/42 from 35/80

1^st number: 35/80, 2^nd number: 1 38/42

35/80 - 80/42 is -493/336.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 42 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 80 × 21 = 1680,
   35/80 = 35 × 21/80 × 21 = 735/1680
3. Likewise, for the 2nd fraction, since 42 × 40 = 1680,
   80/42 = 80 × 40/42 × 40 = 3200/1680
4. Subtract the two like fractions:
   735/1680 - 3200/1680 = 735 - 3200/1680 = -2465/1680
5. After reducing the fraction, the answer is -493/336

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