Answers

Subtract 80/70 from 30/42

1^st number: 30/42, 2^nd number: 1 10/70

30/42 - 80/70 is -3/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   30/42 = 30 × 5/42 × 5 = 150/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   80/70 = 80 × 3/70 × 3 = 240/210
4. Subtract the two like fractions:
   150/210 - 240/210 = 150 - 240/210 = -90/210
5. After reducing the fraction, the answer is -3/7

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