Answers

Subtract 70/9 from 7/20

1^st number: 7/20, 2^nd number: 7 7/9

7/20 - 70/9 is -1337/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 9 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   7/20 = 7 × 9/20 × 9 = 63/180
3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
   70/9 = 70 × 20/9 × 20 = 1400/180
4. Subtract the two like fractions:
   63/180 - 1400/180 = 63 - 1400/180 = -1337/180

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