Answers

Subtract 15/42 from 1/70

1/70 - 15/42 is -12/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 42 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 70 × 3 = 210,
   1/70 = 1 × 3/70 × 3 = 3/210
3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
   15/42 = 15 × 5/42 × 5 = 75/210
4. Subtract the two like fractions:
   3/210 - 75/210 = 3 - 75/210 = -72/210
5. After reducing the fraction, the answer is -12/35

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