Answers

Subtract 72/18 from 25/70

1^st number: 25/70, 2^nd number: 4 0/18

25/70 - 72/18 is -51/14.

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,
   25/70 = 25 × 9/70 × 9 = 225/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   72/18 = 72 × 35/18 × 35 = 2520/630
4. Subtract the two like fractions:
   225/630 - 2520/630 = 225 - 2520/630 = -2295/630
5. After reducing the fraction, the answer is -51/14

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