Answers

Subtract 80/40 from 25/42

1^st number: 25/42, 2^nd number: 2 0/40

25/42 - 80/40 is -59/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   25/42 = 25 × 20/42 × 20 = 500/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   80/40 = 80 × 21/40 × 21 = 1680/840
4. Subtract the two like fractions:
   500/840 - 1680/840 = 500 - 1680/840 = -1180/840
5. After reducing the fraction, the answer is -59/42

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