Answers

Subtract 72/18 from 75/70

1^st number: 1 5/70, 2^nd number: 4 0/18

75/70 - 72/18 is -41/14.

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,
   75/70 = 75 × 9/70 × 9 = 675/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   72/18 = 72 × 35/18 × 35 = 2520/630
4. Subtract the two like fractions:
   675/630 - 2520/630 = 675 - 2520/630 = -1845/630
5. After reducing the fraction, the answer is -41/14

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