Answers

Subtract 35/18 from 28/70

1^st number: 28/70, 2^nd number: 1 17/18

28/70 - 35/18 is -139/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 18 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   28/70 = 28 × 9/70 × 9 = 252/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   35/18 = 35 × 35/18 × 35 = 1225/630
4. Subtract the two like fractions:
   252/630 - 1225/630 = 252 - 1225/630 = -973/630
5. After reducing the fraction, the answer is -139/90

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