Answers

Subtract 25/90 from 2/42

2/42 - 25/90 is -29/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   2/42 = 2 × 15/42 × 15 = 30/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   25/90 = 25 × 7/90 × 7 = 175/630
4. Subtract the two like fractions:
   30/630 - 175/630 = 30 - 175/630 = -145/630
5. After reducing the fraction, the answer is -29/126

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