Answers

Subtract 70/18 from 72/70

1^st number: 1 2/70, 2^nd number: 3 16/18

72/70 - 70/18 is -901/315.

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,
   72/70 = 72 × 9/70 × 9 = 648/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   70/18 = 70 × 35/18 × 35 = 2450/630
4. Subtract the two like fractions:
   648/630 - 2450/630 = 648 - 2450/630 = -1802/630
5. After reducing the fraction, the answer is -901/315

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