Answers

Subtract 70/7 from 20/72

1^st number: 20/72, 2^nd number: 10 0/7

20/72 - 70/7 is -175/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 7 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   20/72 = 20 × 7/72 × 7 = 140/504
3. Likewise, for the 2nd fraction, since 7 × 72 = 504,
   70/7 = 70 × 72/7 × 72 = 5040/504
4. Subtract the two like fractions:
   140/504 - 5040/504 = 140 - 5040/504 = -4900/504
5. After reducing the fraction, the answer is -175/18

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