Answers

Subtract 70/72 from 8/42

8/42 - 70/72 is -197/252.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   8/42 = 8 × 12/42 × 12 = 96/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   70/72 = 70 × 7/72 × 7 = 490/504
4. Subtract the two like fractions:
   96/504 - 490/504 = 96 - 490/504 = -394/504
5. After reducing the fraction, the answer is -197/252

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