Answers

Subtract 25/8 from 84/42

1^st number: 2 0/42, 2^nd number: 3 1/8

84/42 - 25/8 is -9/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 8 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 42 × 4 = 168,
   84/42 = 84 × 4/42 × 4 = 336/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
   25/8 = 25 × 21/8 × 21 = 525/168
4. Subtract the two like fractions:
   336/168 - 525/168 = 336 - 525/168 = -189/168
5. After reducing the fraction, the answer is -9/8

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