Answers

Subtract 35/90 from 6/42

6/42 - 35/90 is -31/126.

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,
   6/42 = 6 × 15/42 × 15 = 90/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   35/90 = 35 × 7/90 × 7 = 245/630
4. Subtract the two like fractions:
   90/630 - 245/630 = 90 - 245/630 = -155/630
5. After reducing the fraction, the answer is -31/126

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