Answers

Subtract 84/81 from 5/42

1^st number: 5/42, 2^nd number: 1 3/81

5/42 - 84/81 is -347/378.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 81 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 42 × 27 = 1134,
   5/42 = 5 × 27/42 × 27 = 135/1134
3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
   84/81 = 84 × 14/81 × 14 = 1176/1134
4. Subtract the two like fractions:
   135/1134 - 1176/1134 = 135 - 1176/1134 = -1041/1134
5. After reducing the fraction, the answer is -347/378

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